SOLUTION: In a test of effectiveness of garlic for lowering cholesterol, 48 subjects were treated with garlic in a processed tablet form. Cholesterol levels were measured before and after th

Question 868534: In a test of effectiveness of garlic for lowering cholesterol, 48 subjects were treated with garlic in a processed tablet form. Cholesterol levels were measured before and after the treatment. The changes in their levels of LDL cholesterol (in mg/dL) have a mean of 3.7 and a standard deviation of 15.9. Complete parts (a) and (b) below.
A. What is the best point estimate of the population mean net change in LDL cholesterol after the garlic treatment?
The best point estimate is ___ mg/dL. (Type an integer or a decimal.)
B. Construct a 95% 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 (mew)?
__ mg/dL (Round to two decimal places as needed.)
(Please show all work, thank you)

Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
In a test of effectiveness of garlic for lowering cholesterol, 48 subjects were treated with garlic in a processed tablet form. Cholesterol levels were measured before and after the treatment. The changes in their levels of LDL cholesterol (in mg/dL) have a mean of 3.7 and a standard deviation of 15.9. Complete parts (a) and (b) below.
A. What is the best point estimate of the population mean net change in LDL cholesterol after the garlic treatment?
The best point estimate is 3.7 mg/dL. (Type an integer or a decimal.)
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B. Construct a 95% confidence interval estimate of the mean net change in LDL cholesterol after the garlic treatment.
sample mean = x-bar = 3.7
ME = 1.96*15.9/sqrt(48) = 4.498
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95% CI: 3.7 - 4.498 < u < 3.7 + 4.498
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Cheers,
Stan H.
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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 (mew)?

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