Is gastric bypass surgery effective for long term weight loss? A Utah-based study from 2000-2011 found that 75.8% of 418 subjects who had had gastric bypass surgery maintained a 20% weight loss for 6 years. a) Construct a 95% confidence interval. b) Interpret the confidence interval in this context. (Give a sentence explaining what the confidence interval means)c) If the interval had been 90% confidence, would it have been wider or narrower?d) Is it plausible that 90% of those who get gastric bypass surgery maintain a 20% weight loss for 6 years? Explain.

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MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Is gastric bypass surgery effective for long term weight loss? A Utah-based study from 2000-2011 found that 75.8% of 418 subjects who had had gastric bypass surgery maintained a 20% weight loss for 6 years.

a) Construct a 95% confidence interval.

b) Interpret the confidence interval in this context. (Give a sentence explaining what the confidence interval means)

c) If the interval had been 90% confidence, would it have been wider or narrower?

d) Is it plausible that 90% of those who get gastric bypass surgery maintain a 20% weight loss for 6 years? Explain.

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