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gle Chrome ? https/ www.mathxl.com Student PlayerHomework.aspx?home orkid-48 62 412&questi; nld-24&flushedsfalse;&cld-S066468; center Secure Home SM 261 -C2 Statistics Summer 2018 nye Colleen Burke 1 7/25/18 7:47 AM Homework: Assignment #7 Chapter 7 Score: 0 of 1 pt 7.3.15 24 of 29 (23 complete) HW Score: 72.87%, 21.13 of 29 pts Question Help * 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 in their levels of LDL cholesterol (in mg/dl) have a mean of 36 and a standard deviation of 193, 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 36 mg/dl Type an integer or a decimal.) b. Construct a 99% confidence interval estimate of the mean net change i LOL cholesterol ater the gar e teatment what does the con de ce interval suggest about the effectiveness of garlic in reducing LDL cholesterol? What is the confidence interval estimate of the population mean ?? Round to two decimal places as needed) Enter your answer in the edit fields and then click Check Answer 1 partExplanation / Answer
Ho: u = 0
Ha: u # 0 (claim that the levels changed)
sample mean = 3.6 ; margin of error = 2.5758*19.3/sqrt(49) = 7.099
99%CI:: 3.6-7.099< u < 3.6+7.099
99%CI:: -3.499 < u < 10.699
The confidence interval limits contain ?0, suggesting that the garlic treatment did not affect the LDL cholesterol levels.
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