# The sample data below represent the number of late and on time flights for Delta, United, and

## Question:

The sample data below represent the number of late and on time flights for Delta, United, and US Airways (Bureau of Transportation Statistics, March 2012).

a. Formulate the hypotheses for a test that will determine if the population proportion of late flights is the same for all three airlines.

b. Conduct the hypothesis test with a .05 level of significance. What is the p-value and what is your conclusion?

c. Compute the sample proportion of late flights for each airline. What is the overall proportion of late flights for the threeairlines?

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**Related Book For**

## Essentials Of Statistics For Business And Economics

**ISBN:** 9781305081598

7th Edition

**Authors:** David Anderson, Thomas Williams, Dennis Sweeney, Jeffrey Cam