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2. Based on data collected by the National Center for Health Statistics, an estimate of the percentage of adults who have at some point in their life been told they have hypertension is 0.24. Suppose we select a simple random sample of 20 U.S. adults. a) If X is a random variable representing the number of people out of our sample of 20 who have been told they have hypertension, what distribution does X have? Be sure to include parameters. b) What is the probability that the number of people will be: i. Exactly two? ii. Fewer than two? iii. Two or more? [Hint: use your answer to ii if you don't want to be here all day!] c) Find the mean and variance for the number of people who have been told they have hypertension.

2. Based on data collected by the National Center for Health Statistics, an estimate of the percentage of adults who have at some point in their life been told they have hypertension is 0.24. Suppose we select a simple random sample of 20 U.S. adults. a) If X is a random variable representing the number of people out of our sample of 20 who have been told they have hypertension, what distribution does X have? Be sure to include parameters. b) What is the probability that the number of people will be: i. Exactly two? ii. Fewer than two? iii. Two or more? [Hint: use your answer to ii if you don't want to be here all day!] c) Find the mean and variance for the number of people who have been told they have hypertension.

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
Section: Chapter Questions
Problem 8CR
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2. Based on data collected by the National Center for Health Statistics, an estimate of the percentage of adults who have at some point in their life been told they have hypertension is 0.24. Suppose we select a simple random sample of 20 U.S. adults. a) If X is a random variable representing the number of people out of our sample of 20 who have been told they have hypertension, what distribution does X have? Be sure to include parameters. b) What is the probability that the number of people will be: i. Exactly two? ii. Fewer than two? iii. Two or more? [Hint: use your answer to ii if you don't want to be here all day!] c) Find the mean and variance for the number of people who have been told they have hypertension.
Transcribed Image Text:2. Based on data collected by the National Center for Health Statistics, an estimate of the percentage of adults who have at some point in their life been told they have hypertension is 0.24. Suppose we select a simple random sample of 20 U.S. adults. a) If X is a random variable representing the number of people out of our sample of 20 who have been told they have hypertension, what distribution does X have? Be sure to include parameters. b) What is the probability that the number of people will be: i. Exactly two? ii. Fewer than two? iii. Two or more? [Hint: use your answer to ii if you don't want to be here all day!] c) Find the mean and variance for the number of people who have been told they have hypertension.
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