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 then after having taken her class.
She conducts a
hypothesis test. The data are as follows.
1 Player 2 Player 3 Player 4
Mean score before class
83 78 93
Mean score after class 80 80
The correct decision