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A Major Airline Company Is Concerned That Its Proportion of Late

Question 64

Multiple Choice

A major airline company is concerned that its proportion of late arrivals has substantially increased in the past month.Historical data shows that on the average 18% of the company airplanes have arrived late.In a random sample of 1,240 airplanes,310 airplanes have arrived late.If we are conducting a hypothesis test of a single proportion to determine if the proportion of late arrivals has increased: What is the value of the calculated test statistic?


A) Z = 6.416
B) Z = 3.208
C) Z = -3.208
D) Z = -6.416
E) Z = 1.833

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