PSYC 3002 Introduction to Basic Statistics Comprehensive Exam Review (Qns & Ans) 2026

PSYC 3002 Introduction to Basic Statistics Comprehensive Exam Review (Qns & Ans) 2026

1. Which of the following is a measure of central tendency?
    - A. Standard deviation
    - B. Variance
    - C. Mean
    - D. Range
    - ANS: C. Mean
    - Rationale: The mean is a measure of central tendency, while
   standard deviation and variance are measures of dispersion, and
   range is a measure of variability.
2. 2. In a normal distribution, what percentage of data falls within
   one standard deviation of the mean?
    - A. 50%
    - B. 68%
    - C. 95%
    - D. 99.7%
    - ANS: B. 68%
    - Rationale: In a normal distribution, approximately 68% of
   the data falls within one standard deviation of the mean.
   3. Which statistical test is used to compare the means of two
   independent groups?
    - A. Chi-square test
    - B. Paired t-test
    - C. Independent t-test
    - D. ANOVA
    - ANS: C. Independent t-test
    - Rationale: The independent t-test is used to compare the
   means of two independent groups.
   4. What is the null hypothesis in hypothesis testing?