MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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Are the flight delay times the same for two different airlines?

For the following test, assume that the two samples are independent simple random samples selected from normally distributed populations and that the population standard deviations are equal (σ1σ1 = σ2σ2) so that the standard error of the difference between means is obtained by pooling the sample variances.

In the table below are the statistics for the flight arrival delay times for flights traveling between city A and city B for two airlines; "Pink" and "Flamingo" airlines. Independent simple random samples of 22 flights from "Pink" and 22 "Flamingo" flights were selected.


Pink Flamingo
n1 = 22 n2 = 22
xˉx̄1 = 47.1 min xˉx̄2 = 52.1 min
s1 = 1 min s2 = 0.5 min


Use a 0.1 significance level to test the claim that the mean amount of delayed flight times between the two airlines is the same.

What are the correct hypotheses? (Select the correct symbols and use decimal values not percentages.)

H0

H1

      Original Claim = 


df = 


Based on the hypotheses, find the following:

Test Statistic = (Round to three decimal places.)

Critical value(s) = ±  (Round to three decimal places.)

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