Exhibit 19-5
It Has Been Hypothesized That There Is No $\sigma$

Exhibit 19-5
It has been hypothesized that there is no difference in the mathematical ability of men and women. To test this hypothesis, it was decided to use the Mann-Whitney-Wilcoxon test. A sample of men and women were given math tests. The scores on the tests are given below.
-Refer to Exhibit 19-5. The standard deviation ( $\sigma$ _T) is

A) 10
B) 11.5
C) 14.2
D) 110