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A random variable X has the following di...

A random variable X has the following distribution
`{:(x,:-3,-2,-1,0,1,2,3),(P(X=x):,0.05,0.1,0.3,0,0.3,0.15,0.1):}`
The mean and variance are

A

`mu= 0.25, sigma^(2)=2.8875`

B

`mu=25, sigma^(2)=2.8`

C

`mu=0.17, sigma^(2)=3.125`

D

`mu=0.13, sigma ^(2)=0.654`

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The correct Answer is:
A
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DIPTI PUBLICATION ( AP EAMET)-THEORETICAL DISTRIBUTIONS-EXERCISE 1 (CHOOSE THE CORRECT ANSWER FROM THE ALTERNATIVE 1,2,3 OR 4 GIVEN )
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  12. If X is the number of heads getting when five coins are tossed, then m...

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  13. If X is the number of heads getting when 8 coins are tossed , then mea...

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  14. If X is the number on the die , when a die is rolled, then mean and st...

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