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# Would a new sample cast doubt on the reported average length of a flight of 299 miles?

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The average length of a flight by regional airlines in the United States has been reported as 299 miles. If a simple random sample of 30 flights by regional airlines were to have x = 314.6 miles and s = 42.8 miles, would this tend to cast doubt on the reported average of 299 miles? Use a two-tail test and the 0.05 level of significance in arriving at your answer.

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The average length of a flight by regional airlines in the United States has been reported as 200 miles. If a simple random sample of 30 flights by regional airlines were to have x = 314.6 miles and s = 42.8 miles, would this tend to cast doubt on the reported average of 299 miles? Use a two-tail test and the ...

#### Solution Summary

The solution provides step by step method for the calculation of t test. Formula for the calculation and interpretations of the results are also included. Interactive excel sheet is included. The user can edit the inputs and obtain the complete results for a new set of data. An answer is provided in Excel.

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