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In a test of the effectiveness of garlic for lowering cholesterol, 44 subjects were treated with...

In a test of the effectiveness of garlic for lowering cholesterol, 44 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 4.2 and a standard deviation of16.2 Complete parts (a) and (b) below.

a. What is the best point estimate of the population mean net change in LDL cholesterol after the garlic treatment?

b. Construct a 90% and 99% confidence interval of the mean net change in LDL cholesterol after the garlic treatment.

Math   Statistics-And-Probability   
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