23. Many people have heard of the "Freshmen 20," referring to the belief that many college freshmen will gain 20 lbs. their freshmen year in school. Administrators were interested in knowing if this is really true. A random sample of thirty freshmen (at the end of their freshmen year) was obtained. The average amount of weight gained by the freshmen is listed below. 21.8 20.6 21 20.2 19.2 17.8 22.8 20.2 22 19.4 18.6 18.2 20 19 21 23 19.6 19 24.6 19.6 17.8 20.6 20.8 17.2 22.4 19.2 23.4 18.2 20.6 21.4 a. Find a 97.5% confidence interval for the average amount of weight gained for freshmen. b. Interpret the CI. c. Using your CI found in part a, can you conclude with 97.5% confidence that college freshmen gained more than 20 lbs.?

23. Many people have heard of the "Freshmen 20," referring to the belief that many college freshmen will gain 20 lbs. their freshmen year in school. Administrators were interested in knowing if this is really true. A random sample of thirty freshmen (at the end of their freshmen year) was obtained. The average amount of weight gained by the freshmen is listed below. 21.8 20.6 21 20.2 19.2 17.8 22.8 20.2 22 19.4 18.6 18.2 20 19 21 23 19.6 19 24.6 19.6 17.8 20.6 20.8 17.2 22.4 19.2 23.4 18.2 20.6 21.4 a. Find a 97.5% confidence interval for the average amount of weight gained for freshmen. b. Interpret the CI. c. Using your CI found in part a, can you conclude with 97.5% confidence that college freshmen gained more than 20 lbs.?

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Description: 23. Many people have heard of the "Freshmen 20," referring to the belief that many college freshmenwill gain 20 lbs. their freshmen year in school. Administrators were interested in knowing if this isreally true. A random sample of thirty freshmen (

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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