Variance/Standard Deviation.

By definition, the variance of the random variable is

In[59]:=

Var = ∫_lowsupport^highsupport (x - ExpValue)^2 f[x] x

Out[59]=

20

The standard deviation is defined to be the square root of the variance:

In[60]:=

StdDev = Var^(1/2)

Out[60]=

2 5^(1/2)


Created by Mathematica  (July 20, 2006) Valid XHTML 1.1!