In a test of the effectiveness of garlic for lowering?cholesterol, 43 subjects were treated with garlic in a processedtablet form. Cholesterol levels were measured before and after thetreatment. The changes in their levels of LDL cholesterol? (inmg/dL) have a mean of 2.7 and a standard deviation of 16.3.Complete parts? (a) and? (b) below.
A. What is the best point estimate of the populationmean net change in LDL cholesterol after the garlic?treatment?
B. Construct a 90?% confidence interval estimate of themean net change in LDL cholesterol after the garlic treatment. Whatdoes the confidence interval suggest about the effectiveness ofgarlic in reducing LDL? cholesterol? What is the confidenceinterval estimate of the population mean mu???
C. What does the confidence interval suggest about theeffectiveness of the? treatment? Do they contain 0? Did it affectthe cholesterol levels?
