When using a t table, the degrees of freedom you should use for a t test for independent means is the:
A)degrees of freedom for Sample 1 divided by the total degrees of freedom for both samples
B)average of the degrees of freedom for the two samples
C)sum of the two sample sizes, minus one
D)sum of the two samples' degrees of freedom

Question

Quizplus · Accepted Answer

The correct choice is D because when conducting a t-test for independent means, the degrees of freedom (df) is calculated by adding the degrees of freedom from both samples, which is each sample size minus one, and then adding these together. So, if Sample 1 has n1 observations and Sample 2 has n2 observations, the degrees of freedom would be (n1 - 1) + (n2 - 1).

When Using a T Table, the Degrees of Freedom You