A smart phone manufacturer is interested in constructing a 90% confidence interval for the proportion of smart phones that break before the warranty expires. 81 of the 1594 randomly selected smart phones broke before the warranty expired.a. Use 3 decimal places to complete the following statement:With 90% confidence the proportion of all smart phones that break before the warranty expires is between and .b. If many groups of 1594 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. A smart phone manufacturer is interested in constructing a 90% confidence interval for theproportion of smart phones that break before the warranty expires. 81 of the 1594 randomlyselected smart phones broke before the warranty expired.a. Use 3 decimal places to complete the following statement:With 90% confidence the proportion of all smart phones that break before the warranty expires is betweenandb. If many groups of 1594 randomly selected smart phones are selected, then a differentconfidence interval would be produced for each group. Aboutpercent of theseconfidence intervals will contain the true population proportion of all smart phones that breakbefore the warranty expires and aboutpercent will not contain the true populationproportion.

n=1594 x=81 so, Sample proportion : p^=811594=0.0508

Answered: A smart phone manufacturer is…

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 smart phone manufacturer is interested in constructing a 90% confidence interval for the proportion of smart phones that break before the warranty expires. 81 of the 1594 randomly selected smart phones broke before the warranty expired.

a. Use 3 decimal places to complete the following statement:

With 90% confidence the proportion of all smart phones that break before the warranty expires is between and .

b. If many groups of 1594 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.