9.48 Example 9.3 gave the following airborne times (in minutes) for 10 randomly selected flights from

Question:

9.48 ● Example 9.3 gave the following airborne times

(in minutes) for 10 randomly selected flights from San Francisco to Washington Dulles airport:

270 256 267 285 274 275 266 258 271 281

a. Compute and interpret a 90% confidence interval for the mean airborne time for flights from San Francisco to Washington Dulles. (Hint: See Example 9.10.)

b. Give an interpretation of the 90% confidence level associated with the interval estimate in Part (a).

c. If a flight from San Francisco to Washington Dulles is scheduled to depart at 10 a.m., what would you recommend for the published arrival time? Explain.

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