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A smart phone manufacturer is interested in constructing a 95% confidence interval for the proportion of...

A smart phone manufacturer is interested in constructing a 95% confidence interval for the proportion of smart phones that break before the warranty expires. 87 of the 1506 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 ______

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