Two Means - Matched Pairs (Dependent Samples): Videos & Practice Problems

A company measured employee satisfaction scores (on a scale of $1$ to $10$) before and after a new training program. The scores for $8$ employees are listed below. Calculate the difference (Before − After) for each employee, then find the mean of the differences $\overline{𝑑}$ and the standard deviation of the differences ${𝑠}_d$.