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In a experiment on relaxation techniques, subject's brain signals were measured before and after the relaxation exercises with the following results: Person 1 2 3

In a experiment on relaxation techniques, subject's brain signals were measured before and after the relaxation exercises with the following results:

Person 1 2 3 4 5
Before 31 37 66 52 28
After 26 34 58 51 26

Assuming the population is normally distributed, is there sufficient evidence to suggest that the relaxation exercise slowed the brain waves? (Use =0.05)

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