Author Question: In testing for differences between the means of two independent populations, the null hypothesis is ... (Read 119 times)

casperchen82 · **on:** Jun 24, 2018

In testing for differences between the means of two independent populations, the null hypothesis is

A) H0 : 1 - 2 = 2. B) H0 : 1 - 2 = 0. C) H0 : 1 - 2 < 2. D) H0 : 1 - 2 > 0.

Question 2

In testing for the differences between the means of 2 independent populations where the variances in each population are unknown but assumed equal, the degrees of freedom are

A) n1 + n2 - 1. B) n - 2. C) n1 + n2 - 2. D) n - 1.