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2. The mean commute time in the US seems might be increasing. The current mean is 25.1 minutes and suppose you know o = 12.

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2. The mean commute time in the US seems might be increasing. The current mean is 25.1 minutes and suppose you know o = 12. If you're testing at the 5% level of significance, a) (5 pts) find the power to find an increase of 2 minutes for a sample of 150. b) (5 pts) how large a sample is needed to have 80% power to find an increase of 2 minutes

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