logo

Ask Questions, Get Answers

 
X
 Search
Want to ask us a question? Click here
Browse Questions
Ad
Home  >>  CBSE XII  >>  Math  >>  Probability
0 votes

Let $X$ be a random variable whose possible values $x_1, x_2, ..., x_n$ occur with probabilities $p(x_1), p(x_2), ..., p(x_n)$ respectively. Then if $\mu$ is the mean of $X$, what is the standard deviation of $X$?

Can you answer this question?
 
 

1 Answer

0 votes
Standard Deviation = $\sqrt Variance$.

Variance = $\sum_{i=1}^{n}p_i\;x_i^2-\mu^2$

Therefore Standard Deviation = $\sqrt (\sum_{i=1}^{n}p_i\;x_i^2-\mu^2)$
answered Apr 18, 2013 by balaji.thirumalai
 

Related questions

Ask Question
student study plans
x
JEE MAIN, CBSE, NEET Mobile and Tablet App
The ultimate mobile app to help you crack your examinations
Get the Android App
...