A research team is interested in the effectiveness of hypnosis in reducing pain. The responses from 8 randomly selected patients before and after hypnosis is recorded in the table below (gher values indicate more pain). Construct a 90% confidence interval for the true mean difference in pain after hypnosis. Can we conclude that hypnosis is effective in reducing pain? Perceived pain levels 'Pre' and 'Post' hypnosis for 8 subjects Pre 12.6 12.3 9.8 10.5 11.3 8.8 11.1 8.8 Post 9.8 5.6 10.9 7.1 7.9 10.7 8.3 7.5 Difference 7.
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