GRE Subject 2026 Practice Test Maths Statistics Free Quiz 2

11. What plot shows the median, quartiles, and outliers?

A. Histogram B. Scatter plot C. Bar chart D. Box plot

12. What measures the strength and direction of a linear relationship?

A. Correlation coefficient B. Covariance C. Regression D. Causation

13. What is a p-value?

A. Effect size B. Confidence interval C. P-value D. Significance level

14. What provides a range of plausible values for a parameter?

A. P-value B. Effect size C. Standard error D. Confidence interval

15. What is the significance level?

A. P-value B. Significance level C. Confidence level D. Effect size

16. What is a Type I error?

A. Accepting a false null B. Rejecting a false null C. Accepting a true null D. Rejecting a true null

17. What is a Type II error?

A. Rejecting a true null B. Failing to reject a false null C. Accepting a true null D. Rejecting a false null

18. What test compares means between two groups?

A. T-test B. ANOVA C. Chi-square D. Regression

19. What test compares means among three or more groups?

A. T-test B. Chi-square C. ANOVA D. Regression

20. What models the relationship between a dependent variable and independent variables?

A. Correlation B. Linear regression C. ANOVA D. Chi-square