Verify that the t test presented in Sec. 9.6 for comparing the means of two normal distributions

Question:

Verify that the t test presented in Sec. 9.6 for comparing the means of two normal distributions is the same as the test presented in this section for the one-way layout with p = 2 by verifying that if U is defined by Eq. (9.6.3), then U2 is equal to the expression given in Eq. (11.6.9).