In a test of the effectiveness of garlic for lowering?cholesterol,
45
subjects were treated with garlic in a processed tablet form.Cholesterol levels were measured before and after the treatment.The changes
?(beforeminus??after)
in their levels of LDL cholesterol? (in mg/dL) have a meanof
5.2
and a standard deviation of
15.8.
Construct a 95?%
confidence interval estimate of the mean net change in LDLcholesterol after the garlic treatment. What does the confidenceinterval suggest about the effectiveness of garlic in reducing LDL?cholesterol?
