Step-by-step Answer
PAGE: 702SET: ExercisesPROBLEM: 1
Please look in your text book for this problem Statement

The total number of residents are .

The average commuting time to work is .

The standard deviation is .

Find the maximum error of estimate for a confidence level.

In a confidence interval, of the area lies in tail.

The corresponding value is .

Formula for maximumu error estimate is .


Find the confidence interval.

The confidence interval CI for a population mean is .

Substitute and .



The confidence interval is .


The confidence interval is .


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