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9) A group of eight individuals with high cholesterol levels were given a new drug that was designed to lower cholesterol levels. Cholesterol levels, in milligrams per deciliter, were measured before and after treatment for each individual, with the following results: Individual Before After 216 210 170 1 277 287 3 270 4 273 200 235 173 6. 255 213 7 299 185 8. 277 188 (a) Construct a 99.5% confidence interval for the mean reduction in cholesterol level. Let d represent the difference in cholesterol level before and after treatment. (b) A physician claims that the mean reduction in cholesterol level is more than 80 milligrams per deciliter. Does the confidence interval contradict this claim?

9) A group of eight individuals with high cholesterol levels were given a new drug that was designed to lower cholesterol levels. Cholesterol levels, in milligrams per deciliter, were measured before and after treatment for each individual, with the following results: Individual Before After 216 210 170 1 277 287 3 270 4 273 200 235 173 6. 255 213 7 299 185 8. 277 188 (a) Construct a 99.5% confidence interval for the mean reduction in cholesterol level. Let d represent the difference in cholesterol level before and after treatment. (b) A physician claims that the mean reduction in cholesterol level is more than 80 milligrams per deciliter. Does the confidence interval contradict this claim?

Holt Mcdougal Larson Pre-algebra: Student Edition 2012
Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter11: Data Analysis And Probability
Section11.5: Interpreting Data
Problem 1C
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9) A group of eight individuals with high cholesterol levels were given a new drug that was designed to lower cholesterol levels. Cholesterol levels, in milligrams per deciliter, were measured before and after treatment for each individual, with the following results: Individual Before After 216 210 170 1 277 287 3 270 4 273 200 235 173 6. 255 213 7 299 185 8. 277 188 (a) Construct a 99.5% confidence interval for the mean reduction in cholesterol level. Let d represent the difference in cholesterol level before and after treatment. (b) A physician claims that the mean reduction in cholesterol level is more than 80 milligrams per deciliter. Does the confidence interval contradict this claim?
Transcribed Image Text:9) A group of eight individuals with high cholesterol levels were given a new drug that was designed to lower cholesterol levels. Cholesterol levels, in milligrams per deciliter, were measured before and after treatment for each individual, with the following results: Individual Before After 216 210 170 1 277 287 3 270 4 273 200 235 173 6. 255 213 7 299 185 8. 277 188 (a) Construct a 99.5% confidence interval for the mean reduction in cholesterol level. Let d represent the difference in cholesterol level before and after treatment. (b) A physician claims that the mean reduction in cholesterol level is more than 80 milligrams per deciliter. Does the confidence interval contradict this claim?
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