An airline company would like to know if the average number of passengers on a f

Question

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

December    n2= 80 x2bar= 482 s2=7

Which test should be used?

T test for the difference between two means

T test

Z test

Z test for the difference between two means

T test for the difference between two means

T test

Z test

Z test for the difference between two means

Explanation / Answer

Ho :- mu1 - mu2 = 0

H1 :- mu1 - mu2 < 0

Answer :- [ T test for the difference between two means ]

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