The weekly demand of a slow-moving product has the following probability mass function

Demand, x	Probability, f(x)
0	0.2
1	0.4
2	0.3
3	0.1
4 or more	0

Find the expected value, variance, and standard deviation of weekly demand.

Problem 23, P.214 TYPE FORMULAS IN COLUMNS D, E, F, AND G BELOW IN PINK AREA Demand, x Probability, f(x) x * f(x) (x - E[X]) (x - E[X])^2 (x - E[X])^2*f(x) 0 0.2 1 0.4 2 0.3 3 0.1 4 0 Expected Value (X) Variance 0 Standard Deviation 0 Hint: Take the square root of the variance