Amparonora13viz
Answered

find the mean the variant ang the standard deviation of the following probably distribution x2,3,4,5 p(x) ¼,¼,¼,¼​

Sagot :

Lemalynnino2007viz

Answer:

Let mean of X be μ

∴μ=∑

x=0

3

X×P(X)=

8

12

=

2

3

∴Var(X)=σ

2

=∑

x=0

3

X

2

×P(X)−μ

2

=

8

24

−

4

9

=

4

3

∴Standard Deviation=σ=

Var(X)

=

4

3

=

2

3

These are the required answers.

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