A smart phone manufacturer is interested in constructing a 90% confidence interval for theproportion of smart phones that break before the warranty expires. 94 of the 1521 randomlyselected smart phones broke before the warranty expired.a. With 90% confidence the proportion of all smart phones that break before the warrantyexpires is betweenandb. If many groups of 1521 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.

From given data we have : x=94 n=1521 thus The sample proportion is p^=xn=941521=0.0618

A smart phone manufacturer is interested in constructing a 90% confidence interval for the proportion of smart phones that break before the warranty expires. 94 of the 1521 randomly selected smart phones broke before the warranty expired. a. With 90% confidence the proportion of all smart phones that break before the warranty expires is between and percent of these b. If many groups of 1521 randomly selected smart phones are selected, then a different confidence interval would be produced for each group. About 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 the proportion of smart phones that break before the warranty expires. 94 of the 1521 randomly selected smart phones broke before the warranty expired. a. With 90% confidence the proportion of all smart phones that break before the warranty expires is between and percent of these b. If many groups of 1521 randomly selected smart phones are selected, then a different confidence interval would be produced for each group. About 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.

Holt Mcdougal Larson Pre-algebra: Student Edition 2012

1st Edition

ISBN:9780547587776

Author:HOLT MCDOUGAL

Publisher:HOLT MCDOUGAL

Chapter11: Data Analysis And Probability

Section: Chapter Questions

Problem 8CR

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