Statistics, Statistical Analysis, Random Variable, Discrete Random Variable, Mathematics.
bE[Y] Zero Mean Random Variable A random variable X with E[X]=0 is said to be zero-mean random variable. Assume a situation when there have been equal number of heads and tails in a fair coin toss then Heads = 1 , Tails = -1 1*1/2 + 1*1/2 = 0 => E[X]=0 Variance and Standard Deviation The variance