In a test of the effectiveness of garlic for lowering cholesterol, 50 subjects w
ID: 3045652 • Letter: I
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 (beforeminusafter) in their levels of LDL cholesterol (in mg/dL) have a mean of 3.7 and a standard deviation of 17.1. Construct a 95% 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 u?
___ mg/dL < u < ___ mg/dL
(Round to two decimal places as needed).
Explanation / Answer
The statistical software output for this problem is:
One sample T summary confidence interval:
: Mean of population
95% confidence interval results:
Hence,
95% confidence interval will be:
-1.16 mg/dL < u < 8.56 mg/dl
Mean Sample Mean Std. Err. DF L. Limit U. Limit 3.7 2.4183052 49 -1.1597662 8.5597662Related Questions
drjack9650@gmail.com
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.