Variance/Standard Deviation.

In[20]:=

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

Out[20]=

25/3

In[21]:=

N[Var^(1/2)]

Out[21]=

2.88675

In[22]:=

(* Alternatively *)∫_lowsupport^highsupport x^2 f[x] x - ExpValue^2

Out[22]=

25/3

In[23]:=

                   StdDev = Var^(1/2)

Out[23]=

5/3^(1/2)


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