SOLUTION: Speed trap on the highway set by the O.P.P. shows that the mean speed of cars is 103.4 km/h with a standard deviation of 9.8 km/h. The posted speed limit on the highway is 100 km/

Algebra ->  Probability-and-statistics -> SOLUTION: Speed trap on the highway set by the O.P.P. shows that the mean speed of cars is 103.4 km/h with a standard deviation of 9.8 km/h. The posted speed limit on the highway is 100 km/      Log On


   

Question 454513: Speed trap on the highway set by the O.P.P. shows that the mean speed of cars is 103.4 km/h with a standard deviation of 9.8 km/h. The posted speed limit on the highway is 100 km/h.
What percentage of drivers are technically driving under the speed limit?

Answer by edjones(8007) About Me  (Show Source):
You can put this solution on YOUR website!
z=(100-103.4)/9.8
=-.3469
Area under curve from -.3469 to 0 is 0.1357
.5 - 0.1357 = .3643 = 36.43%
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Ed