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A local transportation advocacy group wants to estimate the mean time, in minutes, that it takes London commuters to get to work in the morning.
A local transportation advocacy group wants to estimate the mean time, in minutes, that it takes London commuters to get to work in the morning. The group takes a sample of 144 commuters and finds an average commute time of 37 minutes. It is believed that standard deviation of all London commute times is 12 minutes. Construct a 95% confidence interval for the mean morning commute time in London.
- In blank #1 enter the upper limit of the confidence interval.
- In blank #2 enter the lower limit of the confidence interval.
(Round your answers to 2 decimal places and include units.)
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