# Posts by melike

Total # Posts: 4

**Statistics**

Hi * Suppose X has the pdf f(x)=(1/2)e^-|x| if -∞<x<∞ a)find the pdf of Y=|X|^3 b) Let W=0 if x<=0 and W=1 if x>1. Find cdf (cum.dist.func) of W.

**Statistics**

hii. I have a question about pdf and cdf.. I couldn't solve it Please help me :/ 1) the pdf of the random var. X is given by f(x)= (3/8)(x+1)^2 if -1<x<1 0 if otherwise Find the pdf of a) Y=1-X^2 b) Y=1-X^2 ifx<=0 and Y=1-X if x>0

**physics**

with which formula?

**physics**

Calculate the magnitude of the electrostatic force the two down quarks inside a neutron exert on each other if they are separated by a distance of 0.71 fm.