In a test of the effectiveness of garlic for lowering cholesterol, 50 subjects w

Question

In a test of the effectiveness of garlic for lowering cholesterol, 50 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 3.2 and a standard deviation of 15.4. Complete parts (a) and (b) below. Click here to view atdistribution table, Click here to view page 1 of the standard normal distribution table b. Construct a 99% confidence interval estimate of the mean net change in LDL cholesterol after the nic reatment. What does he confidence inter a su est about hee eness of ari en in LDL cholesterol? What is the confidence interval estimate of the population mean ?? -2.64 mg/dL u9.04 mg/dL (Round to two decimal places as needed.) What does the confidence interval suggest about the effectiveness of the treatment? O A. The confidence interval limits contain 0, suggesting that the garlic treatment did not affect the LDL cholesterol levels. O B. The confidence interval limits do not contain 0, suggesting that the garlic treatment did not affect the LDL cholesterol levels. OC. The confidence interval limits do not contain 0, suggesting that the garlic treatment did affect the LDL cholesterol levels O D The confidence interval limits contain O, suggesting that the garlic treatment did affect the LDeneccoeterol levels. lick to select your answer and then click Check Answer. All parts showing Clear All Final Check ID Ai

Explanation / Answer

Solution:-

=> option A. The confidence interval limits contain ?0, suggesting that the garlic treatment did not affect the LDL cholesterol levels.

Because the confidence level is -2.64 to 9.04. so 0 is contain the middle

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