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In a test of the effectiveness of garlic for lowering​ cholesterol, 50 subjects were treated with...

In a test of the effectiveness of garlic for lowering​ cholesterol, 50 subjects were treated with garlic in a processed tablet form. Cholesterol levels were measured before and after the treatment. The changes in their levels of LDL cholesterol​ (in mg/dL) have a mean of 5.7 and a standard deviation of 19.7. Complete parts​ (a) and​ (b) below. a. What is the best point estimate of the population mean net change in ldl cholesterol after garlic treatment? b. Construct a 90% confidence interval estimate of the mean net change in ldl cholesterol after the garlic treatment. What does the confidence interval suggest about the effectiveness of garlic in reducing ldl cholesterol? c. What does the confidence interval suggest about the effectiveness of the treatment?

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