This is just a partial example of the exam. Answer marked in red is the correct answer.
First Term
1429-1430 H Trial Exam
STAT 110 King Abdulaziz
University
Faulty of Sciences Statistics Department
Section:
ID No:
Name:
15
You have 15 questions in 3 pages. You have 120 minutes to solve the exam. Please mark all your answers on the answer sheet provided to you. You can use your question paper to solve problems but only answer sheets will be graded. You have to submit both questions paper and answer sheet. Good luck
Choose the best answer from the following questions:
1. Variables with values that are determined by chance are called
A) random variables. C) inconsistent variables.
B) specialized. D) erratic variables.
2. Each value in a data set may be referred to as either a data value or a(n)
A) data point . B) datum. C) data subset. D) atom.
3. Probability differs from statistics in that
A) Probability deals more with creating models, statistics deals more with applying models
B) Probability is the analysis of chance, statistics is the analysis of data
C) Probability deals more with theoretical data, statistics deals more with real data D) All of the above
4. If you classified the fruit in a basket as apple, orange, or banana, this would be an example of which level of measurement?
A) ordinal B) ratio C) nominal D) interval
5. Which branch of statistics would buy a hundred Toyotas, drive them into the ground, record the final mileage, and then write a report for Car and Driver?
A) inferential statistics C) differential statistics B) predictive statistics D) descriptive statistics
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6. Based on the following graph, what conclusion could you make comparing how well students did on their statistics exam as a function of how many hours they spent preparing for the exam?
A) Hours spent preparing for an exam is a dependent variable.
B) Grades are independent of preparation time.
C) There is no relationship between the number of hours spent preparing for the exam and the average grade.
D) There is a possible relationship between grades and time spent preparing for the exam.
7. An advertisement for a truck states that it is 15% more powerful than it's competitor.
This is an example of
A) ambiguous averages C) detached statistics
B) suspect samples D) changing the subject
8. Which of the following should not be done when constructing a frequency distribution?
A) use a class width with an even number C) find the range
B) use classes that are mutually exclusive D) select the number of classes desired
9. A Pareto chart does not have which of the following properties?
A) The frequencies are arranged from highest to lowest B) The frequencies are arranged from lowest to highest C) It is used to represent categorical data
D) It is a bar chart
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10. What type of graph is the figure below?
A) ogive B) pie graph C) pictograph D) Pareto chart
11. What is the lower class limit in the class 13–17?
A) 13 B) 12.5 C) 17 D) 15
12. Which of the following is the correct mean for the given data?
7, 8, 13, 9, 10, 11
A) 9.67 B) 10 C) 9 D) 9.7
13. The range of the set of numbers {4, 15, 3, 10, 5} is
A) 9 B) 12 C) 15 D) 3
14. What is the median of the following numbers?
–13, 1, –1, –5, –1, –6, –5, –1
A) –3 B) –5 C) –1 D) –7
15. In a unimodal, symmetrical distribution as shown in the figure below.
A) The median and the mode are the same, but the mean can be different.
B) The mean, the median, and the mode are different.
C) The mean, the median, and the mode are the same.
D) The mean is the same as the median, but the mode can be different.
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