A researcher measured people's physiological reactions to horror films. He split the data into two groups: males and females. The resulting data were significantly skewed and men and women had equal variances. What test should be used to analyse the data?
A)Wilcoxon signed-rank test
B)Mann-Whitney test
C)Paired-samples t-test
D)Independent t-test

Question

Quizplus · Accepted Answer

The Mann-Whitney test should be used as the data is significantly skewed and there are two independent groups (men and women) with equal variances. The Wilcoxon signed-rank test is used for paired data, while the paired-samples t-test and independent t-test assume normal distribution of the data.

A Researcher Measured People's Physiological Reactions to Horror Films