of 22 (1 c This Test: 22 pts possible In a test of the effectiveness of garlic f
ID: 3336230 • Letter: O
Question
of 22 (1 c This Test: 22 pts possible In a test of the effectiveness of garlic for before and after the treatment. The changes (before - after) in their levels of LDL cholesterol (in mg/dL) have a mean of 4.4 and a standard 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? Help lowering cholesterol, 48 subjects were treated with garlic in a processed tablet form. Cholesterol levels were measured of 18 6 Click here to view at distribution table what is the confidence interval estimate of the population mean ? (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 O, suggesting that the garlic treatment did affect the LDL. cholesterol levels. O B. The confidence interval limits contain 0, suggesting that the garlic treatment did not affect the LDL cholesterol levels. interval limits do not contain 0, suggesting that the garlic treatment did not affect the LDL cholesteral levels e interval limits do not contain 0, suggesting that the garlic treatment did affect the LDL cholesterol levels Click to select your answer(s). Section 8.1 Homework 10/28/17 11:59pm 8.2 10/28/17Explanation / Answer
= 4.4 = 18.6
n = 48 z = 2.576
Let the confidence interval be (a,b).
a = - z / n and b = + z / n
a = 4.4 - 2.576 * 18.6 / 48 and b = 4.4 + 2.576 * 18.6 / 48
=> a = 3.40 and b = 5.40.
The confidence interval limits do not contain zero, indictating that the garlic treatment did affect the LDL cholestrol levels.
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