Normal Distribution Q: The finish times of racers are....

A

Angel626

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Dec 5, 2006
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The times of the finishers in the New York City 10 km run are normally distributed with a mean of 61 minutes and a standard deviation of 9 minutes. Let X be the time of a randomly selected finisher. Find:

a. P(X>72)
b. P(52<X<70)
c. Find P95 (the 95 percentile point)
 
These are intended to be simple table lookup problems. Do you have a book with a table? Maybe you have a calculator? Tell me what we are working with.
 
I have a few tables. I have to complete this extra credit review sheet and if i get 100% correct then my grade goes up one whole grade. The questions im posting are the ones i forgot how to start out. I did most of the review just some left I dont remember.
 
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