I In a test of the effectiveness of garlic for lowering​ cholesterol, 48 subjects were treated with garlic in a processe

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I
In a test of the effectiveness of garlic forlowering​ cholesterol,
48
subjects were treated with garlic in a processed tablet form.Cholesterol levels were measured before and after the treatment.The changes
​(before−​after)
in their levels of LDL cholesterol​ (in mg/dL) have a meanof
5.4
and a standard deviation of
16.2.
Construct a
99​%
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 reducingLDL​ cholesterol?Click here to view a t distributiontable.
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Question content area bottom
Part 1
What is the confidence interval estimate of the populationmean
μ​?
enter your response here
​mg/dL<μ<enter your response here
​mg/dL
​(Round to two decimal places as​ needed.)
Part 2
What does the confidence interval suggest about theeffectiveness of the​ treatment?
A.The confidence interval limits
contain
​0, suggesting that the garlic treatment
did not
affect the LDL cholesterol levels.
B.The confidence interval limits
do not contain
​0, suggesting that the garlic treatment
did not
affect the LDL cholesterol levels.
C.The confidence interval limits
do not contain
​0, suggesting that the garlic treatment
did
affect the LDL cholesterol levels.
D.The confidence interval limits
contain
​0, suggesting that the garlic treatment
did
affect the LDL cholesterol levels.