(solution) The following table lists the probability distribution of a

(solution) The following table lists the probability distribution of a

 

The following table lists the probability distribution of a discrete random variable x:

x 2 3 4 5 6 7 8
P(x) 0.15 0.31 0.21 0.13 0.12 0.06

0.02

The mean of the random variable x is: 

The standard deviation of the random variable x, rounded to three decimal places, is: 

x p
2
3
4
5
6
7
8 mean=
variance
Standard deviation x*p
0.15
0.31
0.21
0.13
0.12
0.06
0.02 4.02
2.3796
1.542595 x^2
0.3
0.93
0.84
0.65
0.72
0.42
0.16
4.02 x^2*p
4
9
16
25
36
49
64 0.6
2.79
3.36…