Question 255312: The mean arrival rate of flights at O Hare Airport in marginal weather is 195 Flights per hour. To increase arrivals, a new air traffic control procedure is implemented. In the next 30 days of marginal weather the mean arrival rate is 200 flights per hour with a standard deviation of 13 flights.
A) What is the appropriate null and alternate hypothesis to determine if there has been a significant increase in the mean number of arrivals per hour?
B) Using alpha 0.025, what is the critical value for the hypotheses test?
C) What is the test statistic for the hypothesis test?
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! The mean arrival rate of flights at O Hare Airport in marginal weather is 195 Flights per hour. To increase arrivals, a new air traffic control procedure is implemented. In the next 30 days of marginal weather the mean arrival rate is 200 flights per hour with a standard deviation of 13 flights.
A) What is the appropriate null and alternate hypothesis to determine if there has been a significant increase in the mean number of arrivals per hour?
Ho: u = 195
Ha: u > 195
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B) Using alpha 0.025, what is the critical value for the hypotheses test?
Right-tail test with alpha = 2.5%: z = 1.96
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C) What is the test statistic for the hypothesis test?
z(200) = (200-195)/13 = 0.3846
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Conclusion: Since the ts is not in the reject interval, do not reject Ho.
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Cheers,
Stan H.
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