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Freshman , revisited In Exercise 6 you thought about how to design a study to see if its

Stats Modeling the World | 4th Edition | ISBN: 9780321854018 | Authors: David E. Bock, Paul F. Velleman, Richard D. De Veaux ISBN: 9780321854018 481

Solution for problem 36 Chapter 24

Stats Modeling the World | 4th Edition

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Stats Modeling the World | 4th Edition | ISBN: 9780321854018 | Authors: David E. Bock, Paul F. Velleman, Richard D. De Veaux

Stats Modeling the World | 4th Edition

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Problem 36

Freshman , revisited In Exercise 6 you thought about how to design a study to see if its true that students tend to gain weight during their first year in college. Well, Cornell Professor of Nutrition David Levitsky did just that. He recruited students from two large sections of an introductory health course. Although they were volunteers, they appeared to match the rest of the freshman class in terms of demographic variables such as sex and ethnicity. The students were weighed during the first week of the semester, then again 12 weeks later. Based on Professor Levitskys data, estimate the mean weight gain in first-semester freshmen and comment on the freshman 15. (Weights are in pounds.)

Step-by-Step Solution:
Step 1 of 3

Variation of sample mean: With a population standard deviation of σ , the variation of the sample means is σX´ , which the standard deviation of the sample mean: σX= σ √n But if we don’t know the population standard deviation, σ , we use the sample standard deviation, S, to approximate the population standard deviation, and the variation of sample means becomes the standard error of the sample mean: S SEX= √ n In general, as long as outcomes of each trial are independent and from a fixed population (random & no replacement or large population relative to sample), then variation of sample ratio is inversely proportional to square root of sample size:

Step 2 of 3

Chapter 24, Problem 36 is Solved
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Textbook: Stats Modeling the World
Edition: 4
Author: David E. Bock, Paul F. Velleman, Richard D. De Veaux
ISBN: 9780321854018

This full solution covers the following key subjects: . This expansive textbook survival guide covers 31 chapters, and 1357 solutions. The answer to “Freshman , revisited In Exercise 6 you thought about how to design a study to see if its true that students tend to gain weight during their first year in college. Well, Cornell Professor of Nutrition David Levitsky did just that. He recruited students from two large sections of an introductory health course. Although they were volunteers, they appeared to match the rest of the freshman class in terms of demographic variables such as sex and ethnicity. The students were weighed during the first week of the semester, then again 12 weeks later. Based on Professor Levitskys data, estimate the mean weight gain in first-semester freshmen and comment on the freshman 15. (Weights are in pounds.)” is broken down into a number of easy to follow steps, and 116 words. Stats Modeling the World was written by and is associated to the ISBN: 9780321854018. The full step-by-step solution to problem: 36 from chapter: 24 was answered by , our top Statistics solution expert on 03/16/18, 04:57PM. This textbook survival guide was created for the textbook: Stats Modeling the World, edition: 4. Since the solution to 36 from 24 chapter was answered, more than 240 students have viewed the full step-by-step answer.

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Freshman , revisited In Exercise 6 you thought about how to design a study to see if its