In testing the difference between the means of two independent populations,the variances of the two samples can be pooled if the population variances are assumed to ____________.
A)Be unequal
B)Be greater than the mean
C)Sum to 1
D)Be equal

Question

Quizplus · Accepted Answer

When the population variances are assumed to be equal, the samples can be pooled to produce a more accurate estimate of the true variance. This increases the degrees of freedom and allows for a more powerful statistical test. Therefore, in testing the difference between the means of two independent populations, the variances of the two samples can be pooled if the population variances are assumed to be equal.

In Testing the Difference Between the Means of Two Independent