You are given the following information.

Pi	Xi	Pi(Xi)	(Xi-X)	(Xi-X)2	Pi(Xi-X)2
0.2	60
0.5	40
0.1	100
0.2	80

(15 pts) Fill in the table (including totals).

(15 pts) Calculate E(X), aka X.

(15 pts) Calculate Var(X) and std. Dev.

(5 pts) Comment on the results.