In Testing the Difference Between Two Population Means, Which of the Following

Multiple Choice

In testing the difference between two population means, which of the following assumptions is not true for the two-sample procedure that uses a pooled estimate of the common variance ?

A) The two samples must be independent of each other.
B) The two samples must be small and selected at random from the populations.
C) The populations from which the samples are drawn must be t-distributed.
D) The population variances should be equal or nearly equal.
E) None of these.