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. What is the correct null and alternate hypothesis?   A. H0:mu = 0 Ha:mu > 0   B. H0:mu = 0 Ha:mu not equal 0   C. H0:mu1 = mu2 Ha:mu1 < mu2   D. H0:mu1 = mu2 Ha:mu1 not equal mu2

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