NOTES for Thu:

1) Independence---  product rule for expectation, sum rule for variance

2) Indicator Variables--- Binomial Mean & Variance

3) Examples of E[X], E[g(X)]:  Geometric Distribution, 2^X

   [ summation by parts ]  GEO:  p q^x

   Note Geo MEAN is q/p = 5 for a fair die,
            MODE is 0 for any geometric,
          MEDIAN is \floor(log(2)/log(1/q))
                  = [[0.6931472 / 0.1823216 = 3.8017840 ]] = 3

 
   Symmetric distributions like Normal usually have Md = Mn = Mo

4) Guessing & Utility:  minimize   E[ L(X,a) ], L = |X-a| & (X-a)^2

5)