In A Test Of The Effectiveness Of Garlic For Lowering Cholesterol 42 Subjects Were Treated With Garlic In A Processed T 1 (31.71 KiB) Viewed 20 times
In a test of the effectiveness of garlic for lowering cholesterol, 42 subjects were treated with garlic in a processed tablet form. Cholesterol levels were measured before and after the treatment. The changes (before-after) in their levels of LDL cholesterol (in mg/dL) have a mean of 2.9 and a standard deviation of 19.7. 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? Click here to view at 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. BITS What is the confidence interval estimate of the population mean µ? mg/dL <μ< mg/dL (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 do not contain 0, suggesting that the garlic treatment did not affect the LDL cholesterol levels. B. The confidence interval limits do not contain 0, suggesting that the garlic treatment did affect the LDL cholesterol levels. O C. The confidence interval limits contain 0, suggesting that the garlic treatment did not affect the LDL cholesterol levels. O D. The confidence interval limits contain 0, suggesting that the garlic treatment did affect the LDL cholesterol levels.
A study of 420,001 cell phone users found that 0.0310% of them developed cancer of the brain or nervous system. Prior to this study of cell phone use, the rate of such cancer was found to be 0.0328% for those not using cell phones. Complete parts (a) and (b). a. Use the sample data to construct a 90% confidence interval estimate of the percentage of cell phone users who develop cancer of the brain or nervous system. %<p<% (Do not round until the final answer. Then round to three decimal places as needed.) b. Do cell phone users appear to have a rate of cancer of the brain or nervous system that is different from the rate of such cancer among those not using cell phones? Why or why not? O A. Yes, because 0.0328% is included in the confidence interval. O B. Yes, because 0.0328% is not included in the confidence interval. O C. No, because 0.0328% is included in the confidence interval. O D. No, because 0.0328% is not included in the confidence interval.
Join a community of subject matter experts. Register for FREE to view solutions, replies, and use search function. Request answer by replying!