Score: 1.25 of 5 pts 390154 (52 complete) Hw Score: 76.34%, 82.45 of 108 pts 7.3

Question

Score: 1.25 of 5 pts 390154 (52 complete) Hw Score: 76.34%, 82.45 of 108 pts 7.3.15 Question Help ess of garlic for lowering cholesterol, 44 subjects were treated with garlic in a processed tablet form. Cholesterol levels were measured before In a test of the and after the treatment. The changes in their levels of LDL cholesterol (in mg/dL) have a mean of 4.1 and a standard deviation of 17.9.Complete parts (a) and (b) below Click here to view a t Click here to view page 1 of the s istribution table, bution table. a. What is the best point estimate of the population mean net change in LDL cholesterol after the garlic treatment? (Type an integer or a decimal.) b. Construct a 90% 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 ? Round to two Enter your answer in the edit fields and then click Check Answer

Explanation / Answer

Solution:- Given that X = 4.1 , Sd = 17.9 , n = 44

df = n-1 = 44-1 = 43

t = 1.68

b. 90% confidence interval estimate of the mean : X +/- t*s/sqrt(n)
= 4.1 +/- 1.68*17.9/sqrt(44)
= -0.43 , 8.63

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