Answered: sNo (b) Give a 90% confidence…

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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Question

How effective is gastric bypass surgery in maintaining weight loss in extremely obese people? A study conducted found that 75% of a random sample of 431 subjects who had received gastric bypass surgery maintained at least a 20% weight loss six years after surgery.

(a) Are the conditions for the use of the large sample confidence interval met?

YesNo

(b) Give a 90% confidence interval for the proportion of those receiving gastric bypass surgery that maintained at least a 20% weight loss six years after surgery. (Round your answers to four decimal places.)
? to ?

(c) Interpret your interval in the context of the problem. (Round your answers to two decimal places.)

Based on this study, we estimate with 90% confidence that between ? % and ? % of all gastric bypass patients will maintain at least a 20% weight loss for six years after surgery.

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