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/sci/ - Science & Math

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4458773 No.4458773 [Reply] [Original]

help would be much appreciated!! http://answers.yahoo.com/question/index;_ylt=AgBj45zbDdd3mDKaUO0m9xkjzKIX;_ylv=3?qid=20120312142645A
Ass8cs

>> No.4458780

"this question has been deleted"

>> No.4458791

The density of a continuous random variable X is given by:
f(x)=m(1+0.5x) for 0<x<10
f(x)=0 for all other values of x
A) Find m.
B) find the expected value.
C) find the variance of x.

>> No.4458794
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4458794

>>4458791
trolololol
link works really, its just that the last 6 characters arnt in the hyperlink

sage

..umad?

>> No.4458804

>>4458791
m = 1/35

>> No.4458826

Integrate the density function from 0 to 10 and equalize that with 1.
Expected value is integral from -inf to inf of x*f(x)
Var is E[(X-E(X))^2]

sorry, I don't know latex