X 5 8 9 4 10 6 p(X) 1/6 1/6 1/6 1/6 1/6 1/6

Mean : 7

Variance : 4.67

is the mean and variance correct? if wrong plz explain with formula

Printable View

- Feb 7th 2013, 08:28 PMbalajikcp8is the mean and variance correct?
X 5 8 9 4 10 6 p(X) 1/6 1/6 1/6 1/6 1/6 1/6

Mean : 7

Variance : 4.67

is the mean and variance correct? if wrong plz explain with formula

- Feb 7th 2013, 08:43 PMpssingh1001Re: is the mean and variance correct?
Is this statics question naaaaaaaaaaaaaaa..............???????????

plz explain team if u have any idea........

thanks - Feb 18th 2013, 10:11 PMReeferRe: is the mean and variance correct?
Yes that is correct!

Remember the mean for a PMF is the sum from 0 to n of x*p(x) = E[x]

And the variance is E[x^2] - (E[x])^2

Which is p(x)*x^2 - ( p(x)*x)^2