In a test of effectiveness of garlic for lowering cholesterol 49 subjects were treated with garlic in aprocessed tablet form. Cholestero; levels were measured before and after the treatment. The change in their levels of LDL cholesterol(im mg/dl) have a mean of 3.4 and a standard deviation of 18.7.
a. What is the best point of the population mean net change in LDL cholesterol after the garlic treatment?
The best point estimate is mg/dL.
b. Construct a 99% 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?
What is the confidence interval estimate of the population mean u?
What does the confidence level suggest about the effectiveness of the treatment?