Question

In a test of the effectiveness of garlic for lowering cholesterol, 42 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 3.5 and a standard deviation of 16.6. a. What is the best point estimate of the population mean net change in LDL cholesterol after the garlic treatment? 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 μ mg/dL <μ What does the confidence interval suggest about the effectiveness 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.

          In a test of the effectiveness of garlic for lowering
cholesterol, 42 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 3.5 and a standard deviation of 16.6.
a. What is the best point estimate of the population mean net
change in LDL cholesterol after the garlic treatment?
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 μ mg/dL <μ
What does the confidence interval suggest about the
effectiveness 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.

Added by Michael C.

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