Two airlines are being compared with respect to the time it takes them to turn a plane around from the time it lands until it takes off again.The study is interested in determining whether there is a difference in the variability between the two airlines.They wish to conduct the hypothesis test using an alpha = 0.02.If random samples of 20 flights are selected from each airline,what is the appropriate F critical value?
A)3.027
B)2.938
C)2.168
D)2.124

Question

Quizplus · Accepted Answer

The F critical value is determined using an F-distribution table with degrees of freedom for the numerator and denominator both being 19 (since sample size is 20 for each airline, df = n-1 = 19) at alpha = 0.02 for a two-tailed test.

Two Airlines Are Being Compared with Respect to the Time