A random sample of 12 men and 12 women were asked to report the number of hours they watched television on a Wednesday evening. If a researcher wants to test the hypothesis that there is no difference in the amount of time spent watching television based on gender, what $z$-values should be used for a two-tailed Wilcoxon rank sum test, at $\alpha = 0.05$ ?
A) $z = \pm 2.00$
B) $z = \pm 1.67$
C) $z = \pm 3.00$
D) $z = \pm 1.96$

Question

Quizplus · Accepted Answer

For a two-tailed test at $\alpha = 0.05$, the critical $z$-values are $\pm 1.96$, which correspond to the standard normal distribution's critical values for the 2.5th and 97.5th percentiles.

A Random Sample of 12 Men and 12 Women Were zzz

A Random Sample of 12 Men and 12 Women Were $z$