Multiple Choice
Which of the following variables probably could be measured in an observational study of airline travelers?
A) The brand of coffee they drink at home.
B) The occupation of the traveler.
C) How many frequent traveler miles they have earned.
D) The gender of the traveler.
E) The total number of bags taken on the airplane trip (carry-on and checked) .
Correct Answer:
Verified
Correct Answer:
Verified
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