Question

A coach uses a new technique to train gymnasts. 7 gymnasts were randomly selected and their...

  1. A coach uses a new technique to train gymnasts. 7 gymnasts were randomly selected and their competition scores were recorded before and after the training. The results are shown below

Subject

A

B

C

D

E

F

G

Before

9.6

9.7

9.7

9.4

9.7

9.5

9.5

After

9.7

9.9

9.7

9.3

9.8

9.8

9.3

Using a 0.01 level of significance, test the claim that the training technique is effective in raising the gymnasts’ score.

Use the traditional method of hypothesis testing with critical value t= -3.143.

Math   Statistics-And-Probability   
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