A smart phone manufacturer is interested in constructing a 95% confidence interval for the proportion of smart phones that break before the warranty expires. 87 of the 1601 randomly selected smart phones broke before the warranty expired. Round answers to 4 decimal places where possible. a. With 95% confidence the proportion of all smart phones that break before the warranty expires is between and b. If many groups of 1601 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
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ISBN:9781119256830
Author:Amos Gilat
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Chapter1: Starting With Matlab
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A smart phone manufacturer is interested in constructing a
95% confidence interval for the proportion of smart phones
that break before the warranty expires. 87 of the 1601
randomly selected smart phones broke before the warranty
expired. Round answers to 4 decimal places where possible.
a. With 95% confidence the proportion of all smart phones
that break before the warranty expires is between
and
b. If many groups of 1601 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.
t
Transcribed Image Text:A smart phone manufacturer is interested in constructing a 95% confidence interval for the proportion of smart phones that break before the warranty expires. 87 of the 1601 randomly selected smart phones broke before the warranty expired. Round answers to 4 decimal places where possible. a. With 95% confidence the proportion of all smart phones that break before the warranty expires is between and b. If many groups of 1601 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. t
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