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東吳大學104 學年度第二學期商用統計學期中考試卷

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1. 請注意考試規則!

2. 直接在此作答,姓名: _陳怡安_,學號:__ 01122233___

3. 另存新檔為學號

4. 記得儲存,作答完後,附件請寄至 wenft@scu.edu.tw 與 wenft@yahoo.com.tw 5. 請記得 cc 或副本給自己

6. 從 Excel 的結果截圖重要的資訊複製貼上 Word。

7. 回答問題時請詳加說明您的虛無假設與對立假設,以及樣本(母體)的定義 為何(差異檢定時),根據您截圖哪裡做出什麼結論!

8. 每題請說明用到的公式是課本哪一頁哪一個公式代號。

題目開始

A. 根據所附的 Excel 資料檔,回答以下問題:

1. 這是一個從東吳大學隨機抽樣的 68 個學生所回答的問題,CC 數是他購買搖 搖杯的果汁飲料 CC 數。搖搖杯的老闆宣稱她的飲料至少有 435CC,如果您是 學校的學生代表,站在學生的立場您會如何進行這樣宣稱的檢定?顯著水準 為 0.05。

建立虛無假設為飲料=435CC,對立假設為飲料<435CC 母體標準差未知,使用 T 檢定

結果如下

(2)

第一題

Null Hypothesis m= 435

Level of Significance 0.05

Sample Size 68

Sample Mean 432.6323529

Sample Standard Deviation 6.130190549

Standard Error of the Mean 0.7434

Degrees of Freedom 67

t Test Statistic -3.1849

Lower-Tail Test Calculations Area

Lower Critical Value -1.6679 For one-tailed tests:

p -Value 0.0011 TDIST value 0.0010992

Reject the null hypothesis 1-TDIST value 0.9989008 Data

Intermediate Calculations

拒絕虛無假設(飲料 435CC),老闆的說法是錯的。

2. 同 1,若以信賴區間 confidence interval 來估計,其上下界為何?

第二題

Data

Sample Standard Deviation6.130191 Sample Mean 432.6324

Sample Size 68

Confidence Level 95%

Standard Error of the Mean 0.743395

Degrees of Freedom 67

t Value 1.9960

Interval Half Width 1.4838

Interval Lower Limit 431.15 Interval Upper Limit 434.12

Intermediate Calculations

Confidence Interval

(3)

0.05。

虛無假設為 P=0.5,對立假設為 P 不等於 0.5

68 人中,有埃奉者為 37 人

(4)

第三題

Null Hypothesis p = 0.5

Level of Significance 0.05

Number of Items of Interest 37

Sample Size 68

Sample Proportion 0.544117647

Standard Error 0.0606

Z Test Statistic 0.7276

Two-Tail Test

Lower Critical Value -1.9600

Upper Critical Value 1.9600

p -Value 0.4669

Do not reject the null hypothesis Data

Intermediate Calculations

不拒絕虛無假設(一半的人有埃鳳),東吳大學學生約半數學生有埃奉為真。

4. 同 3,東吳大學學生持有愛瘋手機比例的信賴區間 confidence interval 為 何?

(5)

第四題

Data

Sample Size 68

Number of Successes 37

Confidence Level 95%

Sample Proportion 0.544117647

Z Value -1.9600

Standard Error of the Proportion 0.0604

Interval Half Width 0.1184

Interval Lower Limit 0.4257

Interval Upper Limit 0.6625

Intermediate Calculations

Confidence Interval

信賴區間為 42.57% ~ 66.25%

5. 請檢定東吳大學男學生持有愛瘋的比例是否顯著低於女生,顯著水準為 0.5?

虛無假設:男生有埃鳳比例(P1)跟女生有埃鳳比例(P2)一樣,P1=P2,P1-P2=0 對立假設:男生有埃鳳比例(P1)小於跟女生有埃鳳比例(P2),P1<P2

P1 男生有埃鳳為 20/37 P2 女生有埃奉為 17/31

母體標準差未知,樣本大小很大,獨立樣本。使用 Z 分配

(6)
(7)

第五題

Hypothesized Difference 0

Level of Significance 0.05

Group 1

Number of Items of Interest 20

Sample Size 37

Group 2

Number of Items of Interest 17

Sample Size 31

Group 1 Proportion 0.540540541 Group 2 Proportion 0.548387097 Difference in Two Proportions -0.00784656

Average Proportion 0.5441

Z Test Statistic -0.0647

Lower-Tail Test

Lower Critical Value -1.6449

p -Value 0.4742

Do not reject the null hypothesis Data

Intermediate Calculations

不拒絕虛無假設(男女持有埃鳳比例一樣),男女持有埃鳳比例差不多。

6. 同 5,其東吳大學男女生持有愛瘋比例差距的信賴區間 confidence interval 為何?

第六題

Confidence Level 95%

Z Value -1.9600

Std. Error of the Diff. between two Proportions 0.1212

Interval Half Width 0.2376

Interval Lower Limit -0.2455

Interval Upper Limit 0.2298

Confidence Interval Confidence Interval Estimate of the Difference Between Two Proportions

Data

Intermediate Calculations

(8)

CI 為-24.55% ~ 22.98%。

7. 如果我想檢定男生與女生所喝的搖搖杯的容量是否一樣,在顯著水準為 0.05 下,請用信賴區間 confidence interval 的方法來說明是否相同。必要時請 說明您選擇的公式理由。

虛無假設:男飲料平均數 X1=女飲料平均數 X2 對立假設:男飲料平均數 X1 不等於女飲料平均數 X2

母體標準差未知,樣本很不大(男女的 N 都在 30 上下),先用 F 檢定看看是否合 併

(9)

第七題

Level of Significance 0.05

Larger-Variance Sample

Sample Size 31

Sample Variance 40.44516129

Smaller-Variance Sample

Sample Size 37

Sample Variance 36.23423423

F Test Statistic 1.1162

Population 1 Sample Degrees of Freedom 30 Population 2 Sample Degrees of Freedom 36

Calculations Area Upper-Tail Test

Upper Critical Value 1.7764

p -Value 0.3733

Do not reject the null hypothesis Data

Intermediate Calculations

F 檢定大於等於 1,兩個樣本差不多,可以使用合併計算

(10)

第七題

(assumes equal population variances)

Hypothesized Difference 0

Level of Significance 0.05

Population 1 Sample

Sample Size 37

Sample Mean 432.64865

Sample Standard Deviation 6.0194879

Population 2 Sample

Sample Size 31

Sample Mean 432.6129

Sample Standard Deviation 6.359651

Population 1 Sample Degrees of Freedom 36 Population 2 Sample Degrees of Freedom 30

Total Degrees of Freedom 66

Pooled Variance 38.1483

Standard Error 1.5039

Difference in Sample Means 0.0357

t Test Statistic 0.0238

Two-Tail Test

Lower Critical Value -1.9966

Upper Critical Value 1.9966

p -Value 0.9811

Do not reject the null hypothesis Intermediate Calculations

Data

Confidence Level 95%

Degrees of Freedom 66

t Value 1.9966

Interval Half Width 3.0026 Confidence Interval Estimate for the Difference Between Two Means

Data

Intermediate Calculations

Confidence Interval

(11)

B. In the 2008 General Social Survey, participants were asked what their news source is. Among those surveyed in the 18-to 29-year-old age group, 92/262=.351 said that the Internet was their main news source. In the 50-and-over age group , only 59/632=.093 said that the Internet was their main news source. Use this sample information to determine a 99%

confidence interval that estimate the parameter p1-p2 =difference between population proportion who use the Internet as their main source in the two age groups.

虛無假設:P1-P2=0 對立假設:P1>P2

兩樣本獨立,樣本大小都很大,母體標準差未知,使用 Z 分布 B

Hypothesized Difference 0

Level of Significance 0.05

Group 1

Number of Items of Interest 92

Sample Size 262

Group 2

Number of Items of Interest 59

Sample Size 632

Group 1 Proportion 0.351145038 Group 2 Proportion 0.09335443 Difference in Two Proportions 0.257790608

Average Proportion 0.1689

Z Test Statistic 9.3640

Upper-Tail Test

Upper Critical Value 1.6449

p -Value 0.0000

Reject the null hypothesis Data

Intermediate Calculations

(12)

Confidence Level 95%

Z Value -1.9600

Std. Error of the Diff. between two Proportions 0.0317

Interval Half Width 0.0621

Interval Lower Limit 0.1957

Interval Upper Limit 0.3199

Confidence Interval Confidence Interval Estimate of the Difference Between Two Proportions

Data

Intermediate Calculations

信賴區間 P1-P2 為 0.1957~0.3166 之間,表示 P1-P2>0,年輕人使用者比例較多

C. B. A random sample of five college women was asked for their own heights and their mothers’ heights. The researchers wanted to know whether college women are taller on average than their mothers. The results (inches) follow:

Pair 1 2 3 4 5 Daughter 66 64 64 69 66 Mother 61 62 65 66 62

Find the 95% confidence interval for the parameter of interest in this situation.

母體標準差未知,樣本大小很小,相依樣本

(13)

C

Hypothesized Mean Difference 0

Level of significance 0.05

Sample Size 5

DBar 2.6000

Degrees of Freedom 4

SD 2.3022

Standard Error 1.0296

t Test Statistic 2.5253

Lower Critical Value -2.7764

Upper Critical Value 2.7764

p -Value 0.0650

Data

Intermediate Calculations

Two-Tail Test

Do not reject the null hypothesis CI = -2.7764 ~ 2.7764

D. Following are data for 20 individuals on resting pulse rate and whether or not the individual regularly exercise.

Person 1 2 3 4 5 6 7 8 9 10 Pulse 72 62 72 84 60 63 66 72 75 64 Regularly Exercise N Y Y N Y Y N N Y Y

(14)

Person 11 12 13 14 15 16 17 18 19 20 Pulse 62 84 76 60 52 60 64 80 60 64 Regularly Exercise N N N Y Y N Y Y N Y Calculate a 95% confidence interval for the difference in means for the two groups.

母體標準差未知,樣本大小很小,獨立分配,先用 F 檢定看看要不要合併 D

Level of Significance 0.05

Larger-Variance Sample

Sample Size 9

Sample Variance 89

Smaller-Variance Sample

Sample Size 11

Sample Variance 60.89090909

F Test Statistic 1.4616

Population 1 Sample Degrees of Freedom 8 Population 2 Sample Degrees of Freedom 10

Calculations Area Two-Tail Test

Upper Critical Value 3.8549

p -Value 0.5635

Do not reject the null hypothesis Data

Intermediate Calculations

. F 大於等於 1 可以用合併作

(15)

D

(assumes equal population variances)

Hypothesized Difference 0

Level of Significance 0.05

Population 1 Sample

Sample Size 11

Sample Mean 65.090909

Sample Standard Deviation 7.8032627

Population 2 Sample

Sample Size 9

Sample Mean 70.666667

Sample Standard Deviation 9.4339811

Population 1 Sample Degrees of Freedom 10 Population 2 Sample Degrees of Freedom 8

Total Degrees of Freedom 18

Pooled Variance 73.3838

Standard Error 3.8503

Difference in Sample Means -5.5758

t Test Statistic -1.4481

Two-Tail Test

Lower Critical Value -2.1009

Upper Critical Value 2.1009

p -Value 0.1648

Do not reject the null hypothesis Intermediate Calculations

Data

Confidence Level 95%

Degrees of Freedom 18

t Value 2.1009

Interval Half Width 8.0892

Interval Lower Limit -13.6650 Interval Upper Limit 2.5135

Confidence Interval Estimate for the Difference Between Two Means

Data

Intermediate Calculations

Confidence Interval

(16)

CI 為 -13.6650~2.5135

8. Extra point. 請檢定上題 7 男女生的手搖杯 CC 數變異數是否相等,顯著水 準為 0.05。

第七題

Level of Significance 0.05

Larger-Variance Sample

Sample Size 31

Sample Variance 40.44516129

Smaller-Variance Sample

Sample Size 37

Sample Variance 36.23423423

F Test Statistic 1.1162

Population 1 Sample Degrees of Freedom 30 Population 2 Sample Degrees of Freedom 36

Calculations Area Upper-Tail Test

Upper Critical Value 1.7764

p -Value 0.3733

Do not reject the null hypothesis Data

Intermediate Calculations

F 檢定大於等於 1,兩個樣本相等,可以使用合併計算

(17)

1. 請注意考試規則!

2. 直接在此作答,姓名: 陳彥竹,學號:01152429 3. 另存新檔為學號

4. 記得儲存,作答完後,附件請寄至wenft@scu.edu.tw 與wenft@yahoo.com.tw 5. 請記得cc或副本給自己

6. 從Excel的結果截圖重要的資訊複製貼上Word。

7. 回答問題時請詳加說明您的虛無假設與對立假設,以及樣本(母體)的定義 為何(差異檢定時),根據您截圖哪裡做出什麼結論!

8. 每題請說明用到的公式是課本哪一頁哪一個公式代號。

題目開始

A. 根據所附的Excel 資料檔,回答以下問題:

1. 這是一個從東吳大學隨機抽樣的68個學生所回答的問題,CC數是他購買搖 搖杯的果汁飲料CC數。搖搖杯的老闆宣稱她的飲料至少有435CC,如果您 是學校的學生代表,站在學生的立場您會如何進行這樣宣稱的檢定?顯著水 準為0.05。

Ans:假設H0:P≧435 H1:P<435

2. 同1,若以信賴區間confidence interval來估計,其上下界為何?

Ans: s.e=6.0057/√67=0.7337

信賴區間:【432.8-0.7337*1.99, 432.8-0.7337*1.99】

【431.34,434.26】

(18)

3. 根據有無I Phone 檢定東吳大學的學生持有愛瘋的比例為0.5,顯著水準為 0.05。

Ans: 假設H0:P=0.5 H1:P≠0.5

4. 同3,東吳大學學生持有愛瘋手機比例的信賴區間confidence interval為何?

Ans: 信賴區間:【0.5441-2*0.0606,0.5441+2*0.0606】

【0.4229,0.6653】

5. 請檢定東吳大學男學生持有愛瘋的比例是否顯著低於女生,顯著水準為0.5?

6. 同5,其東吳大學男女生持有愛瘋比例差距的信賴區間confidence interval為

何?

7. 如果我想檢定男生與女生所喝的搖搖杯的容量是否一樣,在顯著水準為0.05 下,請用信賴區間confidence interval的方法來說明是否相同。必要時請說明 您選擇的公式理由。

B. In the 2008 General Social Survey, participants were asked what their news source is. Among those surveyed in the 18-to 29-year-old age group, 92/262=.351 said that the Internet was their main news source. In the 50-and-over age group , only 59/632=.093 said that the Internet was their main news source. Use this sample

(19)

C. B. A random sample of five college women was asked for their own heights and their mothers’ heights. The researchers wanted to know whether college women are taller on average than their mothers. The results (inches) follow:

Pair 1 2 3 4 5

Daughter 66 64 64 69 66

Mother 61 62 65 66 62

Find the 95% confidence interval for the parameter of interest in this situation.

Ans: d=(5+2-1+3-4)/5=2.6 sd=2.3022 se=1.0296 信賴區間:【-0.2623,5.4623】

D. Following are data for 20 individuals on resting pulse rate and whether or not the individual regularly exercise.

Person 1 2 3 4 5 6 7 8 9 10

Pulse 72 62 72 84 60 63 66 72 75 64 Regularly Exercise N Y Y N Y Y N N Y Y

Person 11 12 13 14 15 16 17 18 19 20 Pulse 62 84 76 60 52 60 64 80 60 64 Regularly Exercise N N N Y Y N Y Y N Y

Calculate a 95% confidence interval for the difference in means for the two groups.

所以可以假設其母體變異數相等

(20)

8. Extra point. 請檢定上題7男女生的手搖杯CC數變異數是否相等,顯著水準 為0.05。

(21)

1. 請注意考試規則!

2. 直接在此作答,姓名: _____________柯乃瑋_________,學 號:__________02154127________

3. 另存新檔為學號

4. 記得儲存,作答完後,附件請寄至wenft@scu.edu.tw 與wenft@yahoo.com.tw 5. 請記得cc或副本給自己

6. 從Excel的結果截圖重要的資訊複製貼上Word。

7. 回答問題時請詳加說明您的虛無假設與對立假設,以及樣本(母體)的定義 為何(差異檢定時),根據您截圖哪裡做出什麼結論!

8. 每題請說明用到的公式是課本哪一頁哪一個公式代號。

題目開始

A. 根據所附的Excel 資料檔,回答以下問題:

1. 這是一個從東吳大學隨機抽樣的68個學生所回答的問題,CC數是他購買搖 搖杯的果汁飲料CC數。搖搖杯的老闆宣稱她的飲料至少有435CC,如果您 是學校的學生代表,站在學生的立場您會如何進行這樣宣稱的檢定?顯著水 準為0.05。

虛無假設H0 = P = P0 對立假設H1 = P≠P0

Z Test of Hypothesis for the Proportion Data

Null Hypothesis

= 0.5

Level of Significance 0.05

Number of Items of Interest 46

Sample Size 68

Intermediate Calculations

Sample Proportion 0.676470588

Standard Error 0.0606

Z Test Statistic 2.9104

Two-Tail Test

Lower Critical Value -1.9600

Upper Critical Value 1.9600

p-Value 0.0036

Reject the null hypothesis

(22)

P-value < 0.05 所以我們可以拒絕虛無假設H0

此提用到課本CH12 P480summary Z檢定求出p,再加以判斷 2. 同1,若以信賴區間confidence interval來估計,其上下界為何?

Confidence Interval Estimate for the Mean Data

Sample Standard Deviation 6.1301905

Sample Mean 432.63235

Sample Size 68

Confidence Level 95%

Intermediate Calculations

Standard Error of the Mean 0.743394798

Degrees of Freedom 67

t Value 1.9960

Interval Half Width 1.4838

Confidence Interval

Interval Lower Limit 431.15

Interval Upper Limit 434.12

在 95%的信心水準下,飲料的 cc 數介於431.15 – 434.12 之間

此提用到P392summary公式求出區間估計

3. 根據有無I Phone 檢定東吳大學的學生持有愛瘋的比例為0.5,顯著水準為

0.05。

我們先將自資料庫裡有ipone的假設為1 , 無iphone的為0

(23)

Z Test of Hypothesis for the Proportion Data

Null Hypothesis

= 0.5

Level of Significance 0.05

Number of Items of Interest 37

Sample Size 68

Intermediate Calculations

Sample Proportion 0.544117647

Standard Error 0.0606

Z Test Statistic 0.7276

Two-Tail Test

Lower Critical Value -1.9600

Upper Critical Value 1.9600

p-Value 0.4669

Do not reject the null hypothesis

P-value >0.05 , 所以我們無法拒絕H0

此提用到課本CH12 P480summary Z檢定求出p,再加以判斷 類似課本 expample12.13

4. 同3,東吳大學學生持有愛瘋手機比例的信賴區間confidence interval為何?

Confidence Interval Estimate for the Proportion Data

Sample Size 68

Number of Successes 37

Confidence Level 95%

Intermediate Calculations

Sample Proportion 0.544117647

Z Value -1.9600

Standard Error of the Proportion 0.0604

Interval Half Width 0.1184

(24)

Confidence Interval

Interval Lower Limit 0.4257

Interval Upper Limit 0.6625

在 95%的信心水準下, 東吳大學學生持有愛瘋手機的比例在 0.4257 – 0.6625之間

此提用到P392summary公式求出區間估計

5. 請檢定東吳大學男學生持有愛瘋的比例是否顯著低於女生,顯著水準為0.5?

H0: P1-P2 = 0 H1: P1-P2 < 0

Z Test for Differences in Two Proportions Data

Hypothesized Difference 0

Level of Significance 0.5

Group 1

Number of Items of Interest 20

Sample Size 37

Group 2

Number of Items of Interest 17

Sample Size 37

Intermediate Calculations

Group 1 Proportion 0.540540541 Group 2 Proportion 0.459459459 Difference in Two Proportions 0.081081081

Average Proportion 0.5000

Z Test Statistic 0.6975

Lower-Tail Test

Lower Critical Value 0.0000

p-Value 0.7573

Do not reject the null hypothesis

(25)

Confidence Interval Estimate of the Difference Between Two Proportions

Data

Confidence Level 95%

Intermediate Calculations

Z Value -1.9600

Std. Error of the Diff. between two

Proportions 0.1159

Interval Half Width 0.2271

Confidence Interval

Interval Lower Limit -0.1460

Interval Upper Limit 0.3082

在95%信心水準下 ,東吳大學男女生持有愛瘋比例差距的信賴區間介於

-0.1460 - 0.3082

7. 如果我想檢定男生與女生所喝的搖搖杯的容量是否一樣,在顯著水準為0.05 下,請用信賴區間confidence interval的方法來說明是否相同。必要時請說明 您選擇的公式理由。

H0: P1-P2=0 H1: P1-P2≠

男生

Confidence Interval Estimate for the Mean Data

Sample Standard Deviation 5.7693085

Sample Mean 432.97222

Sample Size 36

Confidence Level 95%

Intermediate Calculations

Standard Error of the Mean 0.961551418

Degrees of Freedom 35

t Value 2.0301

(26)

Interval Half Width 1.9521

Confidence Interval

Interval Lower Limit 431.02 Interval Upper Limit 434.92 女生

Confidence Interval Estimate for the Mean Data

Sample Standard Deviation 6.4679582

Sample Mean 432.6

Sample Size 30

Confidence Level 95%

Intermediate Calculations

Standard Error of the Mean 1.180882195

Degrees of Freedom 29

t Value 2.0452

Interval Half Width 2.4152

Confidence Interval

Interval Lower Limit 430.18 Interval Upper Limit 435.02

B. In the 2008 General Social Survey, participants were asked what their news source is. Among those surveyed in the 18-to 29-year-old age group, 92/262=.351 said that the Internet was their main news source. In the 50-and-over age group , only 59/632=.093 said that the Internet was their main news source. Use this sample information to determine a 99% confidence interval that estimate the parameter p1-p2 =difference between population proportion who use the Internet as their

(27)

Data

Confidence Level 99%

Intermediate Calculations

Z Value -2.5758

Std. Error of the Diff. between two Proportions 0.0317

Interval Half Width 0.0816

Confidence Interval

Interval Lower Limit 0.1762

Interval Upper Limit 0.3394

99%信心水準下 , 18-to 29-year-old age use internet as their main news source is between 0.1762 – 0.3394 higher than the propotionusing the Internet as their main news source of news in the population aged 50-and-over age

此題為課本P393的公式 , 與例題10.9相似

C. . A random sample of five college women was asked for their own heights and their mothers’ heights. The researchers wanted to know whether college women are taller on average than their mothers. The results (inches) follow:

Pair 1 2 3 4 5

Daughter 66 64 64 69 66

Mother 61 62 65 66 62

Find the 95% confidence interval for the parameter of interest in this situation.

Daughter 66 64 64 69 66

Mother 61 62 65 66 62

difference 5 2 -1 3 4

Confidence Interval Estimate for the Mean Data

Sample Standard Deviation 2.3021729

Sample Mean 2.6

Sample Size 5

Confidence Level 95%

Intermediate Calculations

Standard Error of the Mean 1.02956301

(28)

4

Degrees of Freedom 4

t Value 2.7764

Interval Half Width 2.8585

Confidence Interval

Interval Lower Limit -0.26

Interval Upper Limit 5.46

Finite Populations

Population Size 95

FPC Factor 0.9785

Interval Half Width 2.7970

Interval Lower Limit -0.20

Interval Upper Limit 5.40

95%信心水準下,女兒平均身高高於媽媽的比例在-0.2 – 5.40之間

此提用到課本P435 formula裡的公式

D. Following are data for 20 individuals on resting pulse rate and whether or not the individual regularly exercise.

Person 1 2 3 4 5 6 7 8 9 10

Pulse 72 62 72 84 60 63 66 72 75 64 Regularly Exercise N Y Y N Y Y N N Y Y

Person 11 12 13 14 15 16 17 18 19 20 Pulse 62 84 76 60 52 60 64 80 60 64 Regularly Exercise N N N Y Y N Y Y N Y

Calculate a 95% confidence interval for the difference in means for the two groups.

Confidence Interval Estimate for the Difference Between Two Means

Data

Confidence Level 95%

(29)

Confidence Interval

Interval Lower Limit -3.2259

Interval Upper Limit 14.0441

95信心水準下 , the individual do not regularly exercise’s resting pulse rate is -3.2259 – 14.0441 higher than the individual regularly exercise .

此提用到課本P443的公式

8. Extra point. 請檢定上題7男女生的手搖杯CC數變異數是否相等,顯著水準

為0.05。

(30)

1. 請注意考試規則!

2. 直接在此作答,姓名: ___林宇柔____,學號:___02154182__________

3. 另存新檔為學號

4. 記得儲存,作答完後,附件請寄至wenft@scu.edu.tw 與wenft@yahoo.com.tw 5. 請記得cc或副本給自己

6. 從Excel的結果截圖重要的資訊複製貼上Word。

7. 回答問題時請詳加說明您的虛無假設與對立假設,以及樣本(母體)的定義 為何(差異檢定時),根據您截圖哪裡做出什麼結論!

8. 每題請說明用到的公式是課本哪一頁哪一個公式代號。

題目開始

A. 根據所附的Excel 資料檔,回答以下問題:

1. 這是一個從東吳大學隨機抽樣的68個學生所回答的問題,CC數是他購買搖 搖杯的果汁飲料CC數。搖搖杯的老闆宣稱她的飲料至少有435CC,如果您 是學校的學生代表,站在學生的立場您會如何進行這樣宣稱的檢定?顯著水 準為0.05。

設虛無假設CC大於等於435,對立假設CC小於435 H0:(咪U)大於等於435

H1:(咪U)小於435

(31)
(32)

拒絕H0,虛無假設不成立,並沒有每杯至少有435CC。

2. 同1,若以信賴區間confidence interval來估計,其上下界為何?

(33)

3. 根據有無I Phone 檢定東吳大學的學生持有愛瘋的比例為0.5,顯著水準為 0.05。

設虛無假設東吳大學學生持有愛瘋的比例等於0.5,對立假設東吳大學學生持 有愛瘋的比例不等於0.5。

n=68 H0:P=0.5

H1:P不等於0.5

37人持有愛瘋 31人未持有愛瘋

4. 同3,東吳大學學生持有愛瘋手機比例的信賴區間confidence interval為何?

P=37/68=0 .54412

(34)

5. 請檢定東吳大學男學生持有愛瘋的比例是否顯著低於女生,顯著水準為0.5?

6. 同5,其東吳大學男女生持有愛瘋比例差距的信賴區間confidence interval為

何?

7. 如果我想檢定男生與女生所喝的搖搖杯的容量是否一樣,在顯著水準為0.05 下,請用信賴區間confidence interval的方法來說明是否相同。必要時請說明 您選擇的公式理由。

8. Extra point. 請檢定上題7男女生的手搖杯CC數變異數是否相等,顯著水準

(35)

that the Internet was their main news source. In the 50-and-over age group , only 59/632=.093 said that the Internet was their main news source. Use this sample information to determine a 99% confidence interval that estimate the parameter p1-p2 =difference between population proportion who use the Internet as their main source in the two age groups.

n1=262 p1=0.351 n2=632 p2=0.093

se1的平方=﹝0.351*(1-0.351)﹞/262→se1=0.029487 se2的平方=﹝0.093*(1-0.093)﹞/632→se2=0.011553 p1-p2=(se1+se2)開根號=0.031669

C. B. A random sample of five college women was asked for their own heights and their mothers’ heights. The researchers wanted to know whether college women are taller on average than their mothers. The results (inches) follow:

Pair 1 2 3 4 5

Daughter 66 64 64 69 66

Mother 61 62 65 66 62

Find the 95% confidence interval for the parameter of interest in this situation.

比媽媽高的比例=4/5=0.8

(36)

95啪的信心水準之下,上限為1.1506,下限為0.4494。

D. Following are data for 20 individuals on resting pulse rate and whether or not the individual regularly exercise.

Person 1 2 3 4 5 6 7 8 9 10

Pulse 72 62 72 84 60 63 66 72 75 64 Regularly Exercise N Y Y N Y Y N N Y Y

Person 11 12 13 14 15 16 17 18 19 20 Pulse 62 84 76 60 52 60 64 80 60 64 Regularly Exercise N N N Y Y N Y Y N Y

(37)

1 1. 請注意考試規則!

2. 直接在此作答,姓名: 穆柏任,學號:03154101 3. 另存新檔為學號

4. 記得儲存,作答完後,附件請寄至wenft@scu.edu.tw wenft@yahoo.com.tw 5. 請記得cc或副本給自己

6. Excel的結果截圖重要的資訊複製貼上Word。

7. 回答問題時請詳加說明您的虛無假設與對立假設,以及樣本(母體)的定義 為何(差異檢定時),根據您截圖哪裡做出什麼結論!

8. 每題請說明用到的公式是課本哪一頁哪一個公式代號。

題目開始

A. 根據所附的Excel 資料檔,回答以下問題:

1. 這是一個從東吳大學隨機抽樣的68個學生所回答的問題,CC數是他購買搖 搖杯的果汁飲料CC數。搖搖杯的老闆宣稱她的飲料至少有435CC,如果您 是學校的學生代表,站在學生的立場您會如何進行這樣宣稱的檢定?顯著水 準為0.05。

H0:飲料大於等於435CC

H1:飲料小於435CC 參考P.463定義部份

參考P.464下半部,虛無假設有大於時選擇左尾檢定。參考P.517公式。

(38)

2. 1,若以信賴區間confidence interval來估計,其上下界為何?

Ans:

上下界為431.15434.12,參考P.429公式。

3. 根據有無I Phone 檢定東吳大學的學生持有愛瘋的比例為0.5,顯著水準為

0.05。

H0:東吳大學的學生持有愛瘋的比例為0.5

H1:東吳大學的學生持有愛瘋的比例不為0.5

無法拒絕虛無假設。參考P.480頁公式。

(39)

3

4. 3,東吳大學學生持有愛瘋手機比例的信賴區間confidence interval為何?

有愛瘋手機比例的95%信賴區間為0.42570.6625。參考P.392公式。

5. 請檢定東吳大學男學生持有愛瘋的比例是否顯著低於女生,顯著水準為0.5?

H0:男學生持有愛瘋的比例低於女生。

H1:男學生持有愛瘋的比例大於等於女生。

無法拒絕虛無假設故男學生持有愛瘋之比例小於女學生,參考P.490公式。

6. 5,其東吳大學男女生持有愛瘋比例差距的信賴區間confidence interval

(40)

何?

7.

東吳大學男女生持有愛瘋比例差距的95%信賴區間為-0.24550.2298。

參考P.393公式

8. 如果我想檢定男生與女生所喝的搖搖杯的容量是否一樣,在顯著水準為0.05 下,請用信賴區間confidence interval的方法來說明是否相同。必要時請說明 您選擇的公式理由。

(41)

5 0.7465趨近於1,故使用Pooled。

95%信賴區間為-3.03832.9668,有通過0故可視為男女所喝飲料容量相

同。

參考P.440公式。

B. In the 2008 General Social Survey, participants were asked what their news source is. Among those surveyed in the 18-to 29-year-old age group, 92/262=.351 said that the Internet was their main news source. In the 50-and-over age group , only 59/632=.093 said that the Internet was their main news source. Use this sample information to determine a 99% confidence interval that estimate the parameter p1-p2 =difference between population proportion who use the Internet as their main source in the two age groups.

(42)

兩組差使用網路當作訊息來源的 99%信賴區間為 0.1762 至 0.3394。

參考 P.392 公式。

C. A random sample of five college women was asked for their own heights and their mothers’ heights. The researchers wanted to know whether college women are taller on average than their mothers. The results (inches) follow:

Pair 1 2 3 4 5

Daughter 66 64 64 69 66

Mother 61 62 65 66 62

Find the 95% confidence interval for the parameter of interest in this situation.

95%信賴區間為 2.6+-1.0296*2.78=2.6+-2.84=-0.26 至 5.44 參考 P.433 公式

D. Following are data for 20 individuals on resting pulse rate and whether or not the individual regularly exercise.

Person 1 2 3 4 5 6 7 8 9 10

Pulse 72 62 72 84 60 63 66 72 75 64 Regularly Exercise N Y Y N Y Y N N Y Y

Person 11 12 13 14 15 16 17 18 19 20 Pulse 62 84 76 60 52 60 64 80 60 64 Regularly Exercise N N N Y Y N Y Y N Y

已註解 [m1]:

(43)

7

Calculate a 95% confidence interval for the difference in means for the two groups.

F 檢定趨近於 1,故使用 Pooled。

(44)

規律運動與脈搏之間的 95%信賴區間為-13.665 至 2.5135 參考 P.440 公式。

9. Extra point. 請檢定上題7男女生的手搖杯CC數變異數是否相等,顯著水準

0.05。

(45)

9 變異數不完全相等,但F檢定可視為相等

(46)

1. 請注意考試規則!

2. 直接在此作答,姓名: ______黃暐玲________,學號:_____03154102_____

3. 另存新檔為學號

4. 記得儲存,作答完後,附件請寄至 wenft@scu.edu.tw 與 wenft@yahoo.com.tw 5. 請記得 cc 或副本給自己

6. 從 Excel 的結果截圖重要的資訊複製貼上 Word。

7. 回答問題時請詳加說明您的虛無假設與對立假設,以及樣本(母體)的定義 為何(差異檢定時),根據您截圖哪裡做出什麼結論!

8. 每題請說明用到的公式是課本哪一頁哪一個公式代號。

題目開始

A. 根據所附的 Excel 資料檔,回答以下問題:

1. 這是一個從東吳大學隨機抽樣的 68 個學生所回答的問題,CC 數是他購買搖 搖杯的果汁飲料 CC 數。搖搖杯的老闆宣稱她的飲料至少有 435CC,如果您是 學校的學生代表,站在學生的立場您會如何進行這樣宣稱的檢定?顯著水準 為 0.05。

p 為飲料 cc 數 H0:p≦435 H1:p>435

(47)

p-value>α,沒有足夠證據顯示拒絕虛無假設,表示飲料 cc 數沒有大於 435 公式:p.474

2. 同 1,若以信賴區間 confidence interval 來估計,其上下界為何?

1

Null Hypothesis m= 435

Level of Significance 0.05

Sample Size 68

Sample Mean 432.6323529

Sample Standard Deviation 6.130190549

Standard Error of the Mean 0.7434

Degrees of Freedom 67

t Test Statistic -3.1849

Upper-Tail Test Calculations Area

Upper Critical Value 1.6679 For one-tailed tests:

p -Value 0.9989 T.DIST.RT value 0.001099192

Do not reject the null hypothesis 1-T.DIST.RT value 0.998900808 Data

Intermediate Calculations

(48)

上界為 431.15,下界為 434.12 公式:p.392

3. 根據有無 I Phone 檢定東吳大學的學生持有愛瘋的比例為 0.5,顯著水準為 0.05。

p:東吳大學的學生持有愛瘋的比例 H0:p=0.5

H1:p≠0.5 1

Data

Sample Standard Deviation 6.1301905

Sample Mean 432.63235

Sample Size 68

Confidence Level 95%

Standard Error of the Mean 0.743394798

Degrees of Freedom 67

t Value 1.9960

Interval Half Width 1.4838

Interval Lower Limit 431.15 Interval Upper Limit 434.12

Intermediate Calculations

Confidence Interval

(49)

數目 編號

有無I

phone 有 數目 編號

有無I phone 無

1 1 有 1 1 4 無 0

2 2 有 1 2 5 無 0

3 3 有 1 3 6 無 0

4 11 有 1 4 7 無 0

5 13 有 1 5 8 無 0

6 16 有 1 6 9 無 0

7 20 有 1 7 10 無 0

8 21 有 1 8 12 無 0

9 22 有 1 9 14 無 0

10 25 有 1 10 15 無 0

11 27 有 1 11 17 無 0

12 28 有 1 12 18 無 0

13 30 有 1 13 19 無 0

14 31 有 1 14 23 無 0

15 33 有 1 15 24 無 0

16 36 有 1 16 26 無 0

17 37 有 1 17 29 無 0

18 40 有 1 18 32 無 0

19 41 有 1 19 34 無 0

20 42 有 1 20 35 無 0

21 44 有 1 21 38 無 0

22 48 有 1 22 39 無 0

23 49 有 1 23 43 無 0

24 50 有 1 24 45 無 0

25 51 有 1 25 46 無 0

26 52 有 1 26 47 無 0

27 53 有 1 27 56 無 0

28 54 有 1 28 60 無 0

29 55 有 1 29 63 無 0

30 57 有 1 30 64 無 0

31 58 有 1 31 68 無 0

32 59 有 1

33 61 有 1

34 62 有 1

35 65 有 1

36 66 有 1

37 67 有 1

(50)

p-value>α/2,沒有足夠證據顯示拒絕虛無假設,表示東吳大學的學生持有 愛瘋的比例和沒有持有愛瘋的比例一樣

公式:p.474

4. 同 3,東吳大學學生持有愛瘋手機比例的信賴區間 confidence interval 為 3

Null Hypothesis p = 0.5

Level of Significance 0.05

Number of Items of Interest 37

Sample Size 68

Sample Proportion 0.544117647

Standard Error 0.0606

Z Test Statistic 0.7276

Two-Tail Test

Lower Critical Value -1.9600

Upper Critical Value 1.9600

p -Value 0.4669

Do not reject the null hypothesis Data

Intermediate Calculations

(51)

[0.4257,0.6625]

公式:p.381

5. 請檢定東吳大學男學生持有愛瘋的比例是否顯著低於女生,顯著水準為 0.5?

p1=東吳大學男學生持有愛瘋的比例 p2=東吳大學女學生持有愛瘋的比例 H0:p1≧p2

H1:p1< p2 3

Data

Sample Size 68

Number of Successes 37

Confidence Level 95%

Sample Proportion 0.544117647

Z Value -1.9600

Standard Error of the Proportion 0.0604

Interval Half Width 0.1184

Interval Lower Limit 0.4257

Interval Upper Limit 0.6625

Intermediate Calculations

Confidence Interval

(52)

數目 編號 男生有數目 編號 男生無數目 編號 女生有數目 編號 女生無

1 1 1 1 6 0 1 2 1 1 4 0

2 3 1 2 8 0 2 11 1 2 5 0

3 13 1 3 10 0 3 20 1 3 7 0

4 16 1 4 15 0 4 22 1 4 9 0

5 21 1 5 17 0 5 25 1 5 12 0

6 28 1 6 18 0 6 27 1 6 14 0

7 31 1 7 19 0 7 30 1 7 23 0

8 33 1 8 24 0 8 37 1 8 29 0

9 36 1 9 26 0 9 40 1 9 32 0

10 41 1 10 34 0 10 48 1 10 38 0

11 42 1 11 35 0 11 49 1 11 46 0

12 44 1 12 39 0 12 51 1 12 56 0

13 50 1 13 43 0 13 53 1 13 63 0

14 52 1 14 45 0 14 55 1 14 68 0

15 54 1 15 47 0 15 58 1

16 57 1 16 60 0 16 61 1

17 59 1 17 64 0 17 66 1

18 62 1

19 65 1

20 67 1

(53)

p-value<α,有足夠證據顯示拒絕虛無假設,表示東吳大學男學生持有愛瘋 的比例和東吳大學女學生持有愛瘋的比例不一樣

公式:p.474

6. 同 5,其東吳大學男女生持有愛瘋比例差距的信賴區間 confidence interval 為何?

同 5 表格

[-0.2455,0.2298]

公式:p.381

7. 如果我想檢定男生與女生所喝的搖搖杯的容量是否一樣,在顯著水準為 0.05 下,請用信賴區間 confidence interval 的方法來說明是否相同。必要時請 說明您選擇的公式理由。

5

Hypothesized Difference 0

Level of Significance 0.5

Group 1

Number of Items of Interest 20 Confidence Level 95%

Sample Size 37

Group 2

Number of Items of Interest 17 Z Value -1.9600

Sample Size 31 Std. Error of the Diff. between two Proportions 0.1212

Interval Half Width 0.2376

Group 1 Proportion 0.540540541

Group 2 Proportion 0.548387097 Interval Lower Limit -0.2455

Difference in Two Proportions -0.00784656 Interval Upper Limit 0.2298

Average Proportion 0.5441

Z Test Statistic -0.0647

Lower-Tail Test

Lower Critical Value 0.0000

p -Value 0.4742

Reject the null hypothesis

Confidence Interval

Data Confidence Interval Estimate

of the Difference Between Two Proportions Data

Intermediate Calculations

Intermediate Calculations

Confidence Level 95%

Z Value -1.9600

Std. Error of the Diff. between two Proportions 0.1212

Interval Half Width 0.2376

Interval Lower Limit -0.2455

Interval Upper Limit 0.2298

Confidence Interval Confidence Interval Estimate of the Difference Between Two Proportions

Data

Intermediate Calculations

(54)

p1=東吳大學男學生所喝的搖搖杯容量 p2=東吳大學女學生所喝的搖搖杯容量 H0:p1=p2

H1:p1≠p2

p-value>α/2,沒有足夠證據顯示拒絕虛無假設,表示東吳大學男學生所喝

7

Level of Significance 0.05

Larger-Variance Sample

Sample Size 31

Sample Variance 40.44516129

Smaller-Variance Sample

Sample Size 37

Sample Variance 36.23423423

F Test Statistic 1.1162

Population 1 Sample Degrees of Freedom 30 Population 2 Sample Degrees of Freedom 36

Calculations Area

Two-Tail Test F.DIST.RT value 0.3733

Upper Critical Value 1.9862

p -Value 0.7466

Do not reject the null hypothesis Data

Intermediate Calculations

(55)

p-value>α/2,沒有足夠證據顯示拒絕虛無假設,表示東吳大學男學生所喝

7

(assumes equal population variances)

Hypothesized Difference 0

Level of Significance 0.05

Population 1 Sample

Sample Size 37 Confidence Level 95%

Sample Mean 432.6486486

Sample Standard Deviation 6.019487871

Population 2 Sample Degrees of Freedom 66

Sample Size 31 t Value 1.9966

Sample Mean 432.6129032 Interval Half Width 3.0026

Sample Standard Deviation 6.359651035

Interval Lower Limit -2.9668 Population 1 Sample Degrees of Freedom 36 Interval Upper Limit 3.0383 Population 2 Sample Degrees of Freedom 30

Total Degrees of Freedom 66

Pooled Variance 38.1483

Standard Error 1.5039

Difference in Sample Means 0.0357

t Test Statistic 0.0238

Two-Tail Test

Lower Critical Value -1.9966

Upper Critical Value 1.9966

p -Value 0.9811

Do not reject the null hypothesis Intermediate Calculations

Data Confidence Interval Estimate

for the Difference Between Two Means Data

Intermediate Calculations

Confidence Interval

(56)

的搖搖杯容量的平均數和東吳大學女學生所喝的搖搖杯容量的平均數一樣 95%信心水準下,信賴區間為[-2.9668,3.0383],區間包含零,表示表示東吳 大學男學生所喝的搖搖杯容量的平均數和東吳大學女學生所喝的搖搖杯容量 的平均數一樣

公式:p.429

B. In the 2008 General Social Survey, participants were asked what their news source is. Among those surveyed in the 18-to 29-year-old age group, 92/262=.351 said that the Internet was their main news source. In the 50-and-over age group , only 59/632=.093 said that the Internet was their main news source. Use this sample information to determine a 99%

confidence interval that estimate the parameter p1-p2 =difference between population proportion who use the Internet as their main source in the two age groups.

p1=18~29 歲主要用網路看新聞的人的人 p2=50 歲以上主要用網路看新聞的人 H0:p1=p2

H1:p1≠p2

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康熹文化 104 學年度學科能力測驗模擬試卷 數學考科解答卷