question archive Suppose that the average trip time from Oak Park to UIC on the Blue line is 20 minutes and that the standard deviation of the population is 4 minutes (sigma=4)
Suppose that the average trip time from Oak Park to UIC on the Blue line is 20 minutes and that the standard deviation of the population is 4 minutes (sigma=4)
Subject:StatisticsPrice: Bought3
Suppose that the average trip time from Oak Park to UIC on the Blue line is 20 minutes and that the standard deviation of the population is 4 minutes (sigma=4). We are interested to know whether the average trip time on Thursdays is shorter. We study a sample of 49 trips on Thursdays and the average is 19 minutes. Execute a hypothesis test at alpha=1% that the average trip time on Thursdays is shorter (that is, that it requires a smaller number of minutes). State Ho, Ha, calculate the appropriate statistic, p-value, state whether you reject Ho vs. not and state your conclusion in plain English.
?1?What is the largest number of minutes that will allow you to reject Ho?
?2?What is the probability that you will reject Ho if mu is actually 19 minutes?
?3?Fill in the probabilities in the table below. Also indicate alpha, beta and power.
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What test concludes |
Ho is true in population |
Ho not true in population |
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Reject Ho |
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Not reject Ho |
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