Matched or Paired Samples · Exercise 36

A golf instructor is interested in determining if a new technique for improving players’ golf scores is effective. The instructor takes four (4) new students and records their 18-hole scores before learning the technique and then after having taken the class. The instructor conducts a hypothesis test. The data are as.

$$\begin{array}{ccccc}& \text{Player 1}& \text{Player 2}& \text{Player 3}& \text{Player 4}\\ \text{Mean score before class}& \text{83}& \text{78}& \text{93}& \text{87}\\ \text{Mean score after class}& \text{80}& \text{80}& \text{86}& \text{86}\end{array}$$
This is:

(a) a test of two independent means.
(b) a test of two proportions.
(c) a test of a single mean.
(d) a test of a single proportion.

OpenStax, Introductory Statistics 2e · §10.4 Matched or Paired Samples · Exercise 36