Homework Help: math

Posted by john on Thursday, July 12, 2012 at 12:48pm.

The times for completing one circuit of a bicycle course are normally distributed with a mean of 81.7 minutes and a standard deviation of 8.6 minutes. An association wants to sponsor a race and provide prizes for the top (that is, fastest) 15% of riders. Where should they expect to set the cutoff time to earn a prize?

math - bobpursley, Thursday, July 12, 2012 at 1:41pm
http://davidmlane.com/hyperstat/z_table.html

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