A smart phone manufacturer is interested in constructing a 90% confidence interval for the proportion of smart phones that break before the warranty expires. 91 of the 1608 randomly selected smart phones broke before the warranty expired. Round answers to 5 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 1608 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 the proportion of smart phones that break before the warranty expires. 91 of the 1608 randomly selected smart phones broke before the warranty expired. Round answers to 5 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 1608 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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