According to a National Public Transportation survey, the average commuting time for people who commute to a city with a population of 1 to 3 million is 19.0 minutes. Suppose a researcher lives in a city with a population of 2.4 million and wants to test this claim in her city. Assume that commuter times are normally distributed in the population. She takes a random sample of commuters and gathers data. The data are analyzed using both Minitab and Excel, and the output is shown here.

What are the results of the study? What are thehypotheses?

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Minitab Output One-Sample T Test of mu 19 vs not19 Mean St DeV SE Mean 95% CI 26 19.534 4.100 0.804 (17.878, 21.190) 0.66 0.513 Excel Output Mean Variance Observations df t Stat P (T<=t) one-tail t Critical one-tail P (T<=t) two-tail t Critical two-tail 19.534 16.813 26 25 0.66 0.256 1.71 0.513 2.06