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Nacirema Airlines is buying a fleet of new fuel-efficient planes. The HogJet and the LitheJet both...

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Statistics

Nacirema Airlines is buying a fleet of new fuel-efficientplanes. The HogJet and the LitheJet both meet their price andperformance needs, and both planes meet EPA noise guidelines.However, the quieter plane is preferred. Each plane is flownthrough a typical takeoff and landing sequence 10 times, whileremote sensors at ground level record the noise levels (indecibels).
The average noise levels from these 10 flights are 80.34 forLitheJet and 82.47 for HogJet, the pooled variance is reported tobe equal to 2.73.
Is there enough evidence to conclude that LitheJet planes arequieter?

Show how to calculate test statistics, p val, etc forconclusion.

Answer & Explanation Solved by verified expert
3.6 Ratings (486 Votes)
n1 10 8034n2 10 8247pooled variance 273pooled standard deviation Sp165227Null and    See Answer
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