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The following are airborne times (in minutes) for 10 randomly selected flights from San Francisco to...

The following are airborne times (in minutes) for 10 randomly selected flights from San Francisco to Washington Dulles airport. 270 257 266 286 274 275 266 258 271 281 (a) Compute a 90% confidence interval for the mean airborne time for flights from San Francisco to Washington Dulles. (Round your answers to three decimal places.) ,

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Answer #1

From the given sample data : Sample size=n=10

Sample mean=

Sample standard deviation =s =

Significance level=

The 90% confidence interval for the mean airborne time for flights from San Francisco to Washington Dulles is ,

; From excel "=TINV(0.1,9)'

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