A smart phone manufacturer is interested in constructing a 95% confidence interval for the proportion of smart phones that break before the warranty expires. 89 of the 1628 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 1628 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.

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.4: Distributions Of Data
Problem 19PFA
Question

A smart phone manufacturer is interested in constructing a 95% confidence interval for the proportion of smart phones that break before the warranty expires. 89 of the 1628 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 1628 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.  

 

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