What is the value of the calculated test statistic

Reference no: EM13190404

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 = 3.208
B. Z = 6.416
C. Z = -3.208
D. Z = -6.416
E. Z = 1.833

Reference no: EM13190404

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