To compute an interval estimate for the difference between the means of two populations, the t distribution _____.
A) is restricted to small sample situations
B) is not restricted to small sample situations
C) can be applied when the populations have equal means
D) None of the answers is correct.

Question

Quizplus · Accepted Answer

The t distribution can be used to compute an interval estimate for the difference between the means of two populations, and it is not restricted to small sample situations. The distribution assumes that both populations are normally distributed and have equal variances (unless the degrees of freedom are adjusted for unequal variances using the Welch-Satterthwaite approximation). The t distribution does not require that the populations have equal means.

To Compute an Interval Estimate for the Difference Between the Means