Statistics assigment question?

Posted on 2015-01-21 07:00:00 in Statistics by YAXIN

In the 2008 Wimbledon tennis tournament, rafael Nadal averaged 115 mph on his first serves. Assume that the distribution of his first serve speeds is Normal with a mean of 115 mph and a standard deviation of 6 mph

a) 10% of his first serves are what speed or faster?

b) what values for the speeds of his first serve would be considered outliers?

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