# 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

Algebra ->  Algebra  -> Probability-and-statistics -> 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       Log On

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 Click here to see ALL problems on Probability-and-statistics 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(57387)   (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. --------------- sample mean = 4.85 seconds --- standard Error = E = 1.96*1.47/sqrt(20) = 0.6443 -------------------- 95% CI: 4.85-0.6443 < u < 4.85+0.6443 ===================================== Cheers, Stan H.