A golf instructor is interested in determining if her new technique for improving players’ golf scores is effective. She takes four new students. She records their 18-hole scores before learning the technique and after having taken her class. She conducts a hypothesis test. The data are shown in the table.
| Player 1 | Player 2 | Player 3 | Player 4 | |
| Mean score before class | 83 | 78 | 93 | 87 |
| Mean score after class | 80 | 80 | 86 | 86 |
This is
- a test of two independent means.
- a test of two proportions.
- a test of a single mean.
- a test of a single proportion.
OpenStax Statistics, 10.4 Matched or Paired Samples (Optional), exercise 40