KING ABDULAZIZ UNIVERSITY Faculty of Sciences
Statistics Department First Exam STAT 110
First Term 1434-1435
A
Name: ID #: Section:
You have 30 questions. You have 90 minutes to solve the exam. Please mark all your answers on the answer sheet provided to you. Make sure that the answer sheet form matches the question form. You have to submit the answer sheet only. Good luck
Choose the best answer for each of the following questions:
1. All subjects of a certain town under study represent a ...
A) parameter B) statistic C) sample D) population
2. The organization and presentation of 500 students favorite team are parts from what is called ...
statistics
A) parameter B) descriptive C) inferential D) probability 3. An example of ... data is preferred subject.
A) nominal B) continuous C) discrete D) ordinal 4. The cars' speed is an example of ... data.
A) continuous B) nominal C) discrete D) ordinal
5. In order to get patients opinion about the services provided to them by a hospital, a sample of 500 patients is selected randomly from each department in the hospital. This is an example of ... sample.
A) random B) stratified C) systematic D) cluster 6. The values 12, 17, 10, 19, 13, 26, 5, 36 are called ...
A) ungrouped frequency distribution. C) grouped frequency distribution.
B) raw data. D) categorical frequency distribution.
7. The students' identification number is an example of ... variable.
A) measurement B) quantitative C) qualitative D) numerical
Use the following to answer questions 8-11:
The following represents the cumulative relative frequency graph for 50 patients' height:
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1
0 31.5 50.5 69.5 88.5 107.5 126.5
. .
Class Boundary for heights Cumulative
Relative Frequency
8. The sample size ...
A) is 1. B) is 8. C) can't be determined. D) is 50.
9. The cumulative relative frequency of patients with heights less than or equal to 60 is ...
A) 0.5 B) 0.1 C) 0.3 D) 0.2
10. The class limit that has the largest frequency is ...
A) 70 - 88 B) 107.5 - 126.5 C) 108 - 126 D) 69.5 - 88.5 11. The cumulative frequency for the fourth class ...
A) is 35 B) can't be determined. C) is 40 D) is 15
12. The yearly income of a family for the past 10 years can be best displayed using ...
A) histogram. B) pie graph. C) time series graph. D) bar chart.
Use the following to answer questions 13-19:
The following frequency distribution represents the amount of sugar in mg/l for a sample of bottled drinks:
Class Limits Frequency
3.0 - 7.0 3
8.0 - 12.0 5
13.0 - 17.0 2
18.0 - 22.0 8
23.0 - 27.0 14
28.0 - 32.0 8
13. The sample size is ...
A) 200 B) 6 C) 32 D) 40 14. The class width is ...
A) 4 B) 25 C) 5 D) 29 15. The second class midpoint is ...
A) 14 B) 12 C) 10 D) 8
16. The lower class boundary for the fourth class is ...
A) 18.05 B) 17.5 C) 17.95 D) 18.5
17. The percentage of the bottled drinks in the second class is ...
A) 0.05% B) 0.13% C) 12.50% D) 2.00%
18. The cumulative frequency for the third class is ...
A) 8 B) 2 C) 10 D) 7
19. The cumulative relative frequency for the second class is ...
A) 0.075 B) 0.13 C) 0.2 D) 0.08
20. Which of the following represent a frequency distribution?
A)
B)
C)
D)
21. ... is the best graph for representing continuous data.
30 – 35 36 – 41 Total
Freq 14 5 17 3 20 59
29 – 28 27 – 33 34 – 40 Total
Class Limits 10 – 16 17 – 23 24 – 30 32 – 38 39 – 45 Total
Freq 1 5 12 7 13 38
Freq 12
Class Limits 19 – 26 27 – 34 35 – 42 43 – 49 50 – 57 Total
Freq 19 14 14 6 1 54
9 16 1 7 45
Class Limits 15 – 21 22 – 28
Class Limits 12 – 17 18 – 23 24 – 29
22. In a pie graph, if the blood type B represent 45% of the distribution, how many degrees would be needed to represent it?
A) 0.45 B) 198 C) 12.50 D) 162 23. The stem part of the value 631 is ...
A) 31 B) 1 C) 63 D) 6
24. The data of car types can be organized in a(an) ...
A) raw data. C) categorical frequency distribution.
B) ungrouped frequency distribution. D) grouped frequency distribution.
Use the following to answer questions 25-26:
The ages in years of 8 patients who are randomly selected from a certain hospital are 12, 30, 5, 20, 5, 36, 28, 21
25. The mean value of the patient's age is ...
A) 125.50 B) 78.50 C) 19.63 D) 157 26. The median value of the patient's age is ...
A) 22.5 B) 20.5 C) 30.5 D) 12.5
27. The average grade of a group of students in a statistics class is called ...
A) population. B) parameter. C) data. D) statistic.
28. The following table represent the final grade of a student for the last term. His average grade will be ...
A) 78.25 B) 78.20 C) 77.73 D) 666.82
29. If the mean of the values 15, 6, x, 4, 20 is 10.6 , then the value of x must be ...
A) 8 B) 53 C) 11.25 D) 13.25
30. If you have the following observations: 13, 10, k, 5, 17, then their median value must be ...
A) 10 or k or 13 B) 13 or k C) k D) k or 10 31. The value of the IQR is always ...
A) greater than or equal to 0. B) less than 0. C) greater than 0. D) less than or equal to 0.
32. The measure of central tendency that is appropriate for the following data set is the ...
7500, 4500, 6000, 3000, 4000, 5000, 70000 A) mode. B) mean. C) median. D) standard deviation.
65 3 ﺔﻴﺑﺮﻌﻟا ﺔﻐﻠﻟا 101 ARAB
95 3 ﺐﺳﺎﺣ تارﺎﻬﻣ 100 CPIT
78 0 دﺎﺼﺘﻗاو بادا ﺔﻳﺰﻴﻠﺠﻧا ﺔﻐﻟ 101 ELCA
84 2 ﺔﻴﻣﻼﺳﻻا ﺔﻓﺎﻘﺜﻟا 101 ISLS
69 3 ﺔﻳﺮﻈﻨﻟا تﺎﺼﺼﺨﺘﻠﻟ تﺎﻴﺿﺎﻳﺮﻟا 111 MATH
ﺔﺟرﺪﻟا ﺔﺒﺴﺘﻜﻣ س 2009/ 2010 ﻲﻧﺎﺜﻟا ﻞﺼﻔﻟا
33. Which of the following statistics cannot be determined from a box plot in the case of right skewed distribution?
A) The range B) The second quartile C) The minimum D) The coefficient of variation Use the following to answer questions 34-37:
The number of days absent by a group of employees in a certain hospital during the summer months are as the following:
9 , 6 , 7 , 2 , 9 , 2 , 7 , 1 , 2 , 3 34. The data is said to ...
A) have no mode. B) be unimodal. C) be bimodal.. D) be multimodal.
35. The value of the standard deviation is ...
A) 230.40 B) 3.12 C) 9.73 D) 15.18
36. If the value of the mean is 4.8, then the standard score for the raw value 11 is ...
A) 0.19 B) –0.19 C) –2 D) 2
37. If the value of the mean is 4.8, then the value of the coefficient of variation is ...
A) 117.5 %. B) 65 %. C) 85.12 %. D) 153.9 %.
Good luck Stat 110 Team
Answer Key 1. D 2. B 3. A 4. A 5. B 6. B 7. C 8. D 9. D 10. A 11. C 12. C 13. D 14. C 15. C 16. B 17. C 18. C 19. C 20. B 21. D 22. D 23. C 24. C 25. C 26. B 27. D 28. C 29. A 30. A 31. A 32. C 33. D
34. (No Answer Provided) 35. B
36. D 37. B B
