A researcher examining the jet lag that people experience when flying long distances obtained the following data measuring the number of days required to adjust after a long flight. Do the data indicate significant differences in jet lag depending on the direction of travel? Test with
Given info:
The data with appropriate values are provided in the question
Westbound  Eastbound  Same timezone  




Calculation:
Step 1:
State the testing hypotheses:
Null hypothesis:
Alternate hypothesis:
Step 2: Compute the degrees of freedom:
So,
With
Now,
Similarly,
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