When testing the difference between two dependent population means,the test statistic is based on a ________.
A)pooled variance
B)standard deviation of the differences
C)pooled proportion
D)sum of the population variances

Question

Quizplus · Accepted Answer

When we are testing the difference between two dependent population means, we use the paired t-test. The test statistic for paired t-test is based on the standard deviation of the differences between the paired observations. Therefore, the best choice is B, the standard deviation of the differences. The other options (pooled variance, pooled proportion, and sum of population variances) are used in other types of hypothesis testing, not for dependent population means.

When Testing the Difference Between Two Dependent Population Means,the Test