One of the T-Procedures for Making Inferences About Two Independent

Multiple Choice

One of the t-procedures for making inferences about two independent populations requires that the samples are independent.Of the following, which would guarantee this independence?

A) The samples are simple random samples from each of the populations.
B) The sample sizes are at least 30 for each of the populations.
C) The populations are normally distributed.
D) The population variances are equal.
E) The sample sizes are equal.