In a test of the effectiveness of garlic for lowering cholesterol, 43 subjects were treated with garlic in a processed tablet form. Cholesterol levels were measured before and after the treatment. The changes (before-after) in their levels of LDL cholesterol (in mg/dL) have a mean of 5 6 and a standard deviation of 15,5
Construct a 95% confidence interval estimate of the mean not change in LDL cholesterol after the garlic treatment. What does the confidence interval suggest about
the effectiveness of garlic in reducing LDL cholesterol?
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