Let X be a random variable with probability density function:

f(x)= (3/4)(1-x^2), -1 < x < 1

0, otherwise

What is the standard deviaton of x?

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- Mar 11th 2008, 01:44 AMchaddyStandard Deviation
Let X be a random variable with probability density function:

f(x)= (3/4)(1-x^2), -1 < x < 1

0, otherwise

What is the standard deviaton of x? - Mar 11th 2008, 02:01 AMmr fantastic
- Mar 11th 2008, 02:40 AMchaddy
Okay, so where

Thus

Is that right?

Then but I am not sure how to find that last integral? - Mar 11th 2008, 05:20 AMmr fantastic