An airline company would like to know if the average number of passengers on a flight in November is less than the average number of passengers on a flight in December. The results of random sampling are printed below.
November n1= 75 x1bar= 476 s1=9
Decembern2= 80 x2bar= 482 s2=7
Which test should be used?
Z test for the difference between two means
T test for the difference between two means
Z test
T test
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