Project #65278 - Maths support

 

Exercise 1

 

Show that the variance can be written in the following form:

𝑉𝑎𝑟 (𝑋)=𝐸[𝑋2]−[𝐸𝑋])2

You may use the following:

𝑎±ð‘2=𝑎2+𝑏2±2𝑎𝑏


 

Exercise A

 

Let 𝑋 be a discrete random variable with support 𝑅𝑋={0,1,2,3} and described by function 𝑝𝑋𝑥=16;𝑥𝑅𝑋

Compute its variance.

 


 

Exercise B1

 

Let 𝑋 be a discrete random variable with support 𝑅𝑋={0,1,2,3,4} and probability mass function:

𝑝𝑋𝑥= 𝑥10𝑖𝑓𝑥𝑅𝑋0𝑜𝑡ℎ𝑒𝑟𝑤𝑖𝑠𝑒

Compute its variance.

Subject Mathematics
Due By (Pacific Time) 04/05/2015 10:05 pm
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