in a test of the effectiveness of garlic for lowering cholesterol, 47 subjocts w
ID: 3069422 • Letter: I
Question
in a test of the effectiveness of garlic for lowering cholesterol, 47 subjocts were treated with garlic in a procossod tablet form. Cholestorol levels were moasured before and after the treatment. Tho changes in their levels of LDL cholesterol (in mo/'dL) have a moan of 2.8 and a standard deviation of 18.2. Complote parts (a) and (b) belovw Click here to view a t distribution table Click here to view page 1 of the standard normal distribution table Click here to view page 2 of the standard normal distribution table, a. What is the best point estimato of the population mean net change in LDL cholesterol after the garlic treatment? The best point estimate is mgdL. Type an integer or a decimal.) b. Construct a 95% confidence interval estimate of the mean net change in LDL cholesterol after tho offectiveness of garlic in reducing LDL. cholesterol? what is the confdenco interval estimate of the population mean ? garlic treatment what does he fidence interval suggest about the (Round to two decimal places as nooded.) What does the confidence interval suggest about the effectiveness of the treatment? OA. The confide ance interval limits contain 0, suggesting that the garlic treatment did affect the LDL cholesterol levels. confidence interval limits do not contain 0, suggesting that the garlic treatment did affect the LDL cholesterol levols O C. The contidence interval limits do not contain O, suggesting that the garlic treatment did not affect the LDL. cholesterol levels confidence interval limits contain O, suggesting that the garlic treatment did not affect the LDL. cholesteral levels Click to salart unir anauarelExplanation / Answer
The statistical software output for this problem is:
One sample T summary confidence interval:
: Mean of population
95% confidence interval results:
Hence,
a) Best point estimate = 2.8 mg/dL
b) 95% confidence interval:
-2.54 mg/dL < < 8.14 mg/dL
c) Option D is correct.
Mean Sample Mean Std. Err. DF L. Limit U. Limit 2.8 2.6547428 46 -2.5437202 8.1437202Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.