Matched or Paired Samples (Optional) · Try It 2

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

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

OpenStax, Statistics · §10.4 Matched or Paired Samples (Optional) · Try It 2