Thompson Rivers University MATH1140 Statistics – Final Exam (150+ Questions And Answers with Rationales

Thompson Rivers University
MATH1140 Statistics – Final Exam
(150+ Questions And Answers with
Rationales)

COURSE OVERVIEW
MATH1140 Statistics is an introductory course
covering the fundamental concepts and methods of
statistics. Topics typically include descriptive statistics,
probability, discrete and continuous probability
distributions, sampling distributions, confidence
intervals, hypothesis testing, correlation, and
regression. The final exam is often cumulative, testing
knowledge from the entire course.


PART 1: DESCRIPTIVE STATISTICS (Questions 1-30)

,Question 1
What is the mean of the following data set: 4, 8, 6, 5,
3?
• A) 4.0
• B) 5.0
• C) 5.2
• D) 6.0
• Answer: C
• Rationale: Mean = (4 + 8 + 6 + 5 + 3) / 5 = =
5.2.


Question 2
What is the median of the data set: 12, 7, 9, 5, 10?
• A) 7
• B) 8
• C) 9
• D) 10
• Answer: C

, • Rationale: Sorted: 5, 7, 9, 10, 12. Median is the
middle value = 9.


Question 3
What is the mode of the data set: 2, 3, 4, 4, 5, 6, 6, 6,
7?
• A) 4
• B) 5
• C) 6
• D) 7
• Answer: C
• Rationale: The mode is the value that appears
most frequently: 6 appears three times.


Question 4
What is the median of the data set: 3, 7, 8, 5, 12, 10?
• A) 7
• B) 7.5

, • C) 8
• D) 8.5
• Answer: B
• Rationale: Sorted: 3, 5, 7, 8, 10, 12. Median =
average of middle two values = (7 + 8) / 2 = 7.5.


Question 5
What is the range of the data set: 15, 22, 18, 30, 25?
• A) 10
• B) 15
• C) 20
• D) 25
• Answer: B
• Rationale: Range = Maximum − Minimum = 30 −
15 = 15.


Question 6
What is the variance of the data set: 2, 4, 6?