SOLUTION: the probabilities that a production process will produce 0,1,2,3,4, or 5 units in one hour are 0.05,0.16,0.21,0.34,0.22 and 0.02, respectively. find the mean and the standard devia

Question 847508: the probabilities that a production process will produce 0,1,2,3,4, or 5 units in one hour are 0.05,0.16,0.21,0.34,0.22 and 0.02, respectively. find the mean and the standard deviation of this probability distribution
Answer by swincher4391(1107) (Show Source): You can put this solution on YOUR website!
mean = 0*0.05 + 1 * 0.16 + 2*0.21 + 3*0.34 + 4 * 0.22 + 5* 0.02 =
n = 6
find the second moment
0^2*0.05 + 1^2 * 0.16 + 2^2*0.21 + 3^2*0.34 + 4^2 * 0.22 + 5^2* 0.02 = 8.08
Take second moment - (first moment)^2
=
That's our variance. To find SD square root.
=

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