Patricia has collected data on 30 individuals.She measured the pulse rate of 15 individuals after they had watched a violent film clip.She measured the pulse rate of the other 15 people after they had watched a non-violent film clip.Because she knows her study does not meet the assumptions for a two-tailed t-test,what nonparametric test should she run?
A)Wilcoxon T
B)A two-way
C)A Mann-Whitney U
D)a Friedman

Question

Patricia has collected data on 30 individuals.She measured the pulse rate of 15 individuals after they had watched a violent film clip.She measured the pulse rate of the other 15 people after they had watched a non-violent film clip.Because she knows her study does not meet the assumptions for a two-tailed t-test,what nonparametric test should she run?
A)Wilcoxon T 
B)A two-way 
C)A Mann-Whitney U 
D)a Friedman

Quizplus · Accepted Answer

The Mann-Whitney U test is a nonparametric test used to determine if there is a significant difference between two independent groups. It is the appropriate choice when the assumptions of a two-tailed t-test are not met, which is the case in this scenario where the data is not normally distributed. The Wilcoxon T and Friedman tests are not appropriate for this scenario as they are used for dependent samples and three or more related groups, respectively. The two-way ANOVA is not appropriate as there are only two groups being compared.

Patricia Has Collected Data on 30 Individuals