A researcher conducted an experiment to see if specific eye exercises can improve peripheral vision. A random sample of 5 people were rated for peripheral vision on a scale from 1 to 20, where 9 is considered average and higher scores indicate better peripheral vision. Then they followed the prescribed eye exercise program and were rated again. The results follow below. Subject 1 2 3 4 S Before 8 7 10 6 After 10 19 11 12 19 Test the hypothesis that the exercises improved peripheral vision. Use a 5% significance level. 19

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