A smart phone manufacturer is interested in constructing a 95% confidence interval for the proportion of smart phones that break before the warranty expires. 81 of the 1662 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 1662 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.
question 17
A smart phone manufacturer is interested in constructing a 95% confidence interval for the proportion of smart phones that break before the warranty expires. 81 of the 1662 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 1662 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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