a. With 90% confidence the proportion of all smart phones that break before the warranty expires is between and b. If many groups of 1592 randomly selected smart phones are selected, then a different confidence interval would be produced for each group. About percent of these confidence intervals will contain the true population proportion of all smart phones that break before the warranty expires and about percent will not contain the true population proportion.

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
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• Question 21
<>
A smart phone manufacturer is interested in constructing a 90% confidence interval for the
proportion of smart phones that break before the warranty expires. 80 of the 1592 randomly
selected smart phones broke before the warranty expired. Round answers to 4 decimal places
where possible.
a. With 90% confidence the proportion of all smart phones that break before the warranty
expires is between
and
b. If many groups of 1592 randomly selected smart phones are selected, then a different
confidence interval would be produced for each group. About
percent of these
confidence intervals will contain the true population proportion of all smart phones that break
before the warranty expires and about
percent will not contain the true population
proportion.
> Next Question
MacBook Air
80
DII
DD
F3
F4
F5
Transcribed Image Text:2 points possible 7/22 answered • Question 21 <> A smart phone manufacturer is interested in constructing a 90% confidence interval for the proportion of smart phones that break before the warranty expires. 80 of the 1592 randomly selected smart phones broke before the warranty expired. Round answers to 4 decimal places where possible. a. With 90% confidence the proportion of all smart phones that break before the warranty expires is between and b. If many groups of 1592 randomly selected smart phones are selected, then a different confidence interval would be produced for each group. About percent of these confidence intervals will contain the true population proportion of all smart phones that break before the warranty expires and about percent will not contain the true population proportion. > Next Question MacBook Air 80 DII DD F3 F4 F5
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