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Problem 3

 

9.11 Hypothesis Test to Compare Two Population Variances: Independent Sampling

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Arrival time variation:    Variation in the on-time arrival percentage was analyzed for 21 time blocks accounting for every hour of the day at Miami International Airport and Fort Lauderdale International Airport.  The standard deviation for MIA was 14.2 (with a mean on-time arrival rate of 66.7%).  The standard deviation for FLL was 12.5 (with a mean on-time arrival rate of 78.0%).  At the 5% significance level, test the claim that the two airports have the same variation in on-time rates.  

 

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