Homework Help: statistics

Posted by Lindsay on Wednesday, August 3, 2011 at 8:40am.

A sales firm receives an average of four calls per hour on its toll-free number. For any given hour, find the probability that it will receive exactly eight calls

statistics - MathGuru, Wednesday, August 3, 2011 at 6:39pm
Try the Poisson Distribution.

Poisson distribution (m = mean):
P(x) = e^(-m) m^x / x!

Values:
x = 8
m = 4

Substitute and calculate.

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