Question: An airline has a regular flight between two cities. From a previous study, we estimate the standard deviation of the flight times to be 8.34

An airline has a regular flight between two cities. From a previous study, we estimate the standard deviation of the flight times to be 8.34 minutes. We want a 90% confidence interval for the average flight time with a margin of error of 2.5 minutes. How many flights must they include in the study to find that confidence interval

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=+b) Using the test you selected, state your conclusion.

=+a) Which of these tests is appropriate for these data? Explain.

=+e) Use the pooled t-test to test the hypothesis and compare your answer to parts c and d.