Question

Consider the following data: x 5      6   7    8 9 P ( X = x...

Consider the following data: x 5      6   7    8 9

P ( X = x ) 0.1 0.1 0.3   0.1 0.4

Math   Statistics-And-Probability   
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Answer #1

Ans-

To find out some information from this data we have construct this table-

x p(X=x) x.p(X=x) x^2p(X=x)
5 0.1 0.5 2.5
6 0.1 0.6 3.6
7 0.3 2.1 14.7
8 0.1 0.8 6.4
9 0.4 3.6 32.4
7.6 59.6

now the mean for the given data

E(X) =7.6 = mean

Variance(X) = 59.6 - 7.6 =52

Note - If you need more information comment below, there is not mention particular problem.

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