Continental airlines confidence intervals

Reference no: EM13104242

The mean number of hours of flying time for pilots at Continental Airlines is 49 hours per month (The Wall Street Journal, February 25, 2003). Assume that this mean was based on actual flying times for a sample of 100 Continental pilots and that the sample standard deviation was 8.5 hours.

a. At 95% confidence, what is the margin of error?

b. What is the 95% confidence interval estimate of the population mean flying time for the pilots?

c. The mean number of hours of flying time for pilots at United Airlines is 36 hours per month (assume that this is just known to be true). Use your results from part b to discuss differences between the flying times for the pilots at the two airlines. The Wall Street Journal reported United Airlines as having the highest labor cost among all airlines. Does the information in this exercise provide insight as to why United Airlines might expect higher labor costs? Assume the salaries are the same for pilots at both airlines.

Reference no: EM13104242

Questions Cloud

What is the mechanical power required to keep the house cool : An air conditioner is used to keep the interior of a house at a temperature of 25C while the outside temperature is 34C a)If heat leaks into the house at the rate of 11kW, and the air conditioner has the efficiency of a Carnot engine, what is the ..

Probability related to sample sizes : A scientist wants a confidence interval of 90% and a margin of error of +-2 for a mean of a Normal population with σ =10. What size samples should she take?

Simple linear regression of mean disposable income : Leasing agents from the Triangle Mall Management Corporation have suggested that Sunflowers Apparel considered several locations in some of Triangles newly renovated lifestyle malls that cater to shoppers with higher than mean disposable income.

Population mean and margin of error : A population is Normally distributed and has a σ = 24. Samples of size 25 have a sample mean of 100. Find the 90% confidence interval for the population mean.

Continental airlines confidence intervals : The mean number of hours of flying time for pilots at Continental Airlines is 49 hours per month (The Wall Street Journal, February 25, 2003).

Determine the position of particle moves along x axis : A particle moves along x axis according to equations x =2.00+3.00t-1.00t2, where x is in meters and t seconds. At t=3.00s, determine (a) the position of particle. (b) its velocity, and (c ) its acceleration.

Advantages & disadvantages of flexible staffing in workforce : What are some considerations that (you) could take in developing and implementing an accident prevention program for plant personnel?

Confidence interval for simple random sample : A simple random sample of 50 items from a population with σ 6 resulted in a sample mean of 32.

Confidence interval for flight departure on time : Arrivals 2011. Will your flight get you to your destination on time? The U.S. Bureau of Transportation Statistics publishes information about airline performance.

User Account

All Pages