23. Of 1019 U.S. adults responding to a 2017 Harris poll, 52% said they always or often read nutrition labels when grocery shopping. a) Construct a 95% confidence interval for the population proportion of U.S. adults who always or often read nutrition labels when grocery shopping.

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
Question
Number 23
23. Of 1019 U.S. adults responding to a 2017 Harris poll, 52% said they always or
often read nutrition labels when grocery shopping.
a) Construct a 95% confidence interval for the population proportion of U.S.
adults who always or often read nutrition labels when grocery shopping.
b) What is the width of the 95% confidence interval?
c) Name a confidence level that would produce an interval wider than the
95% confidence interval. Explain why you think this interval would be
wider than a 95% confidence interval.
Transcribed Image Text:23. Of 1019 U.S. adults responding to a 2017 Harris poll, 52% said they always or often read nutrition labels when grocery shopping. a) Construct a 95% confidence interval for the population proportion of U.S. adults who always or often read nutrition labels when grocery shopping. b) What is the width of the 95% confidence interval? c) Name a confidence level that would produce an interval wider than the 95% confidence interval. Explain why you think this interval would be wider than a 95% confidence interval.
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