Matched or Paired Samples · Try It 2

A new prep class was designed to improve SAT test scores. Four students were selected at random. Their scores on two practice exams were recorded, one before the class and one after. The data recorded in. Are the scores, on average, higher after the class? Test at a 5% level.

$$\begin{array}{ccccc}\text{SAT Scores}& \text{Student 1}& \text{Student 2}& \text{Student 3}& \text{Student 4}\\ \text{Score before class}& \text{1840}& \text{1960}& \text{1920}& \text{2150}\\ \text{Score after class}& \text{1920}& \text{2160}& \text{2200}& \text{2100}\end{array}$$

Its source prints no answer for this problem, so there's nothing to check against.

OpenStax, Introductory Statistics 2e · §10.4 Matched or Paired Samples · Try It 2