SOLUTION: x P(x) 0 0.2 1 0.1 2 0.3 3 0.4 Find the expected value of the probability distribution. Round to two decimal places. Find the standard deviation of the pro

Question 1192580:
x P(x)

0 0.2
1 0.1
2 0.3
3 0.4
Find the expected value of the probability distribution. Round to two decimal places.

Find the standard deviation of the probability distribution. Round to two decimal places.
Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
add x*p(x) for each
0+0.1+0.6+1.2=1.90 expected value.
-
variance is squared dev. * prob. =(-1.9)^2*0.2+(-0.9)^2*0.1+(0.1)^2*0.3+1.1^2*0.4
=0.722+0.081+0.003+0.484
=1.29
sd=sqrt(V)=sqrt (1.29)=1.14
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