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The following sample data represent the number of late and on-time flights for Delta, United, and US Airways. a. Formulate the hypotheses for a test that will determine whether 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 pp -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 three airlines?
Sagot :
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