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]%]%). (Round to one decimal place as needed.) b) The 90% confidence interval is

]%]%). (Round to one decimal place as needed.) b) The 90% confidence interval is

MATLAB: An Introduction with Applications
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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A poll of 1047 U.S. adults split the sample into four age groups: ages 18-29, 30-49, 50-64, and 65+. In the youngest age group, 59% said that they thought the U.S. was ready for a woman president, as opposed to 38% who said "no, the country was not ready" (3% were undecided). The sample included 262 18- to 29-year olds. a) Do you expect the 90% confidence interval for the true proportion of all 18- to 29-year olds who think the U.S. is ready for a woman president to be wider or narrower than the 90% confidence interval for the true proportion of all U.S. adults? b) Construct a 90% confidence interval for the true proportion of all 18- to 29-year olds who believe the U.S. is ready for a woman president. a) The 90% confidence interval for the true proportion of 18- to 29-year olds who think the U.S. is ready for a woman president will be about twice as wide as the 90% confidence interval for the true proportion of all U.S. adults who think this. b) The 90% confidence interval is ( %. %). (Round to one decimal place as needed.)
Transcribed Image Text:A poll of 1047 U.S. adults split the sample into four age groups: ages 18-29, 30-49, 50-64, and 65+. In the youngest age group, 59% said that they thought the U.S. was ready for a woman president, as opposed to 38% who said "no, the country was not ready" (3% were undecided). The sample included 262 18- to 29-year olds. a) Do you expect the 90% confidence interval for the true proportion of all 18- to 29-year olds who think the U.S. is ready for a woman president to be wider or narrower than the 90% confidence interval for the true proportion of all U.S. adults? b) Construct a 90% confidence interval for the true proportion of all 18- to 29-year olds who believe the U.S. is ready for a woman president. a) The 90% confidence interval for the true proportion of 18- to 29-year olds who think the U.S. is ready for a woman president will be about twice as wide as the 90% confidence interval for the true proportion of all U.S. adults who think this. b) The 90% confidence interval is ( %. %). (Round to one decimal place as needed.)
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