Google Answers: Statistics

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Q: Statistics ( No Answer, 0 Comments )

Question

Subject: Statistics
Category: Reference, Education and News > Homework Help
Asked by: probing-ga
List Price: $5.00

Posted: 27 Feb 2005 15:58 PST
Expires: 28 Feb 2005 14:11 PST
Question ID: 481995

A claim is made that GM-powered racecars are faster than those using
Ford engines.  The qualifying times for a sample of 11 Ford powered
cars at a raceway were 119.02 seconds with a standard deviation of
1.76 seconds.  For a similar sample of 11 GM powered racecars, the
mean qualifying time 118.50 seconds with a standard deviation of 1.24
seconds.  Test the hypothesis at the 0.05 level of significance that
GM-powered cars are faster (that is, they take less time to complete
the qualifying laps).

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