In conducting hypothesis testing for difference between two means when samples are dependent (paired samples),the variable under consideration is $$D$$
;the sample mean difference between the pairs.

Question

In conducting hypothesis testing for difference between two means when samples are dependent (paired samples),the variable under consideration is $$D$$ 
;the sample mean difference between the pairs.

Quizplus · Accepted Answer

In paired sample hypothesis testing, the variable of interest is the difference $D$ between each pair of observations, and the test is conducted on the mean of these differences.

In Conducting Hypothesis Testing for Difference Between Two Means When DDD

In Conducting Hypothesis Testing for Difference Between Two Means When $D$