When testing for the significance of the difference between two sample means, which of the following must be estimated before computing the test statistic?
A) the critical region
B) the standard deviation of the sampling distribution
C) the standard deviations of the samples
D) the population means

Question

Quizplus · Accepted Answer

The standard deviation of the sampling distribution, also known as the standard error, must be estimated to compute the test statistic for the difference between two sample means.

When Testing for the Significance of the Difference Between Two