<PRE><B>Question 655414</B>
The personnel manager of Cumberland Pig Iron Company is studying the number of on-the-job accidents over a period of one monnth. He developed the following probablity distribution. Compute the mean, variance, and standard deviation of the number of accidents in a month. 

Number of accidents:0,1,2,3,4 respectively
Probability:.40, .20, .20, .10, .10 respectively
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mean = 1.3
variance = 1.345^2 = 1.809 
std dev = 1.345
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Cheers,
Stan H.
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