The waking times (in minutes past 5:00 a.m.) of 40 people who start work at 8:00 a.m
Chapter 6, Problem 1(choose chapter or problem)
The waking times (in minutes past 5:00 a.m.) of 40 people who start work at 8:00 a.m. are shown in the table at the left. Assume the population standard deviation is 45 minutes. Find (a) the point estimate of the population mean m and (b) the margin of error for a 90% confidence interval.
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