A study was conducted to determine the effectiveness of hypnotism on reducing pain. Using standard pain scale, their pain levels were measured before and after hypnosis. The stats before hypnosis were 8 subjects, a sample mean of 8.713, and a sample standard deviation of 2.177. For after hypnosis, the 8 subjects had a sample mean of 5.588 and a sample standard deviation of 2.608. Does hypnosis reduce pain levels by more than 1 measurement unit?

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