SOLUTION: A race car driver tested his car for the number of seconds required to travel from 0 to 60 mph. In 20 test he obtained an average of 4.85 seconds with a standard deviation of 1.47
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Question 308806: A race car driver tested his car for the number of seconds required to travel from 0 to 60 mph. In 20 test he obtained an average of 4.85 seconds with a standard deviation of 1.47 seconds. Construct a 95% confidence interval for the 0 to 60 time.
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
A race car driver tested his car for the number of seconds required to travel from 0 to 60 mph.
In 20 tests he obtained an average of 4.85 seconds with a standard deviation of 1.47 seconds. Construct a 95% confidence interval for the 0 to 60 time.
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sample mean = 4.85 seconds
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standard Error = E = 1.96*1.47/sqrt(20) = 0.6443
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95% CI: 4.85-0.6443 < u < 4.85+0.6443
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Cheers,
Stan H.
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