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

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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
0.3
0.24
0.13
0.1
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:

 

 
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