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You have decided to resolve scientifically a long-running controversy among commuters, as to which railroad is late more often.

You have decided to resolve scientifically a long-running controversy among commuters, as to which railroad is late more often. People from Connecticut and Westchester County claim that Metro-North is late more frequently, while commuters from Long Island claim that no one is late more often than the Long Island Railroad (LIRR). The Excel file for this check-up contains data you have collected from dozens of trips on each of the two commuter train lines. Perform a hypothesis test to see whether either group of commuters can claim that its train service is late more frequently than the other. Use a 95% confidence interval. Use Excel to make your calculations. Step


1: Formulate the null and alternative hypotheses; specify whether you're running a one or two tail test

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 μ ​ N ​ ​  : Mean delay time for Metro-North  μ ​ L ​ ​... View the full answer

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