For a very conservative test when we don't pool the variances we should
A) work at a = .01 instead of a = .05.
B) insist that the critical value of t be twice the tabled value.
C) use a much reduced number of degrees of freedom.
D) throw up our hands and call the problem too difficult.

Question

Quizplus · Accepted Answer

When variances are not pooled, the degrees of freedom are reduced using the Welch-Satterthwaite equation, leading to a more conservative test.

For a Very Conservative Test When We Don't Pool the Variances