When would the use of a nonparametric statistical test be most appropriate?
A) When only interval-level measurements are available
B) When an increase in power is desired
C) When the Ns are very small
D) When normality and equal variances are not problematic

Question

Quizplus · Accepted Answer

Nonparametric tests are recommended when the assumptions of normality and homogeneity of variances are violated, or when the sample size is small. Hence option C is correct. The other options are incorrect as nonparametric tests can be used when measurements are nominal, ordinal or interval-level (option A), or when an increase in power is not a primary concern (option B), or when normality and equal variances are problematic (option D).

When Would the Use of a Nonparametric Statistical Test Be