In a test of the effectiveness of garlic for lowering? cholesterol, 45 subjects were treated with garlic in...

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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?

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Solution Given thatPoint estimate sample mean    See Answer
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