The average flying hours for Continental Airlines pilots is 49 hours per month (The Wall Street Journal, February 25, 2003). Assume that this mean was based on actual flight times for a sample of 100 Continental pilots and that the sample standard deviation was 8.5 hours. a) With 95% confidence, what is the margin of error? b) Give a 95% estimate interval for the population average of pilot flight hours. c) The average flight hours for United Airlines pilots is 36 hours per month. Use the results from part b to analyze the difference between the number of flight hours of the pilots of the two airlines. The walla street journal reports that united airlines has the highest labor costs of all airlines. Does the information given in these exercises help you understand why United Airlines can be expected to have the highest costs?
The average flying hours for Continental Airlines pilots is 49 hours per month (The Wall Street Journal, February 25, 2003). Assume that this mean was based on actual flight times for a sample of 100 Continental pilots and that the sample standard deviation was 8.5 hours.
a) With 95% confidence, what is the margin of error?
b) Give a 95% estimate interval for the population average of pilot flight hours. c) The average flight hours for United Airlines pilots is 36 hours per month. Use the results from part b to analyze the difference between the number of flight hours of the pilots of the two airlines. The walla street journal reports that united airlines has the highest labor costs of all airlines. Does the information given in these exercises help you understand why United Airlines can be expected to have the highest costs?
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