Researchers conduct a test of mean differences using the t distribution with sample sizes of 30 and 35. The researchers specify a two-tailed test and set alpha at 0.05. What is the degrees of freedom they need to obtain the critical value for their test?
A) 29
B) 34
C) 63
D) 65

Question

Quizplus · Accepted Answer

The degrees of freedom for a two-sample t-test is calculated as the sum of the sample sizes minus 2, which is (30 + 35 - 2) = 63.

Researchers Conduct a Test of Mean Differences Using the T