In a test of the effectiveness of garlic for lowering cholesterol, 49 subjects w

Question

In a test of the effectiveness of garlic for lowering cholesterol, 49 subjects were treated with garlic in a processed tablet form. Cholesterol levels were measured before and after the treatment. The changes n their levels of LDL cholesterol (in mg/dL) have a mean of 3, 4 and a standard deviation of 18.2, Complete parts and below What s the best point estimate of the population mean net change in LDL cholesterol after the garlic treatment? The best point estimate s mg/dL. (Type an integer or a decimal.) Construct a 99% 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 mu? (Round to two decimal places as needed) What does the confidence interval suggest about the effectiveness of the treatment? The confidence interval limits do not contain 0, suggesting that the garlic treatment did affect the LDL cholesterol levels The confidence interval limits do not contain 0, suggesting that the garlic treatment did not affect the LDL cholesterol levels The confidence interval limits contain 0, suggesting that the garlic treatment did affect the LDL cholesterol levels The confidence interval limits contain 0, suggesting that the garlic treatment did not affect the LDL cholesterol levels.

Explanation / Answer

a)point estimate =3.4

b)std error =std deviaiton/(n)1/2 =2.6

for 99% CI, z=2.5758

hence confidence interval =mean +/- z*std error =-3.30 ; 10.10 Pls revert on this

option D is correct

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