cutebab6723
13.07.2021 •
Mathematics
For the following distribution:
x P(x)
0 0.900
1 0.09
2 0.007
3 0.003
What is the variance of the distribution?
a. 1.13.
b. 1.5.
c. 0.113.
d. 2.1.
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Ответ:
Step-by-step explanation:
Given, :
x P(x)
0 0.900
1 0.09
2 0.007
3 0.003
The expected variance ; Var(X) = x²*p(x) - E(X)²
The expected mean, E(X) = x*p(x)
E(X) = (0*0.9) + (1*0.09) + (2*0.007) + (2*0.003) = 0.113
Var(X) = [(0^2*0.9) + (1^2*0.09) + (2^2*0.007) + (3^2*0.003)] - 0.113^2
Var(X) = 0.145 - 0.012769
Var(X) = 0.132
Ответ:
I need this answer to
Step-by-step explanation:
pls somebody help