(Answered) In a test of the effectiveness of garlic for lowering

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In a test of the effectiveness of garlic for lowering cholesterol,48subjects 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 2.7and a standard deviation of 18.9. Complete parts (a) and (b) below.

What is the best point estimate of the population mean net change in LDL cholesterol after the garlic treatment?The best point estimate is =__ mg/dL.

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