Question

If you roll an eight sided die and x is the outcomes, the probability distribution of x is

x	P(x)
1	1/8
2	1/8
3
4
5
6
7
8

Mean = x.p(x) =

Variance = x2.px-μ2 =

Standard deviation =

Answer 1

the necessary calculation table is :-

x	P(X)	x*P(x)	x2*P(x)
1	1/8 =0.125	0.125	0.125
2	0.125	0.25	0.5
3	0.125	0.375	1.125
4	0.125	0.5	2
5	0.125	0.625	3.125
6	0.125	0.75	4.5
7	0.125	0.875	6.125
8	0.125	1	8
		sum=4.5	sum=25.5

mean ,variance and sd be:-

mean()
variance
standard deviation

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