Roll a fair die once. If spot 5 or 6 are observed, you win 2 dollars. If spot 3 or 4 are observed,
you win nothing, and if spot 1 or 2 are
observed, you loss 2 dollars. Let X be the profit
(or loss) of playing the game. Find the standard
deviation ofX
a.
About 1.63 dollars.
b
About 2.33 dollars.
c.
About 2.23 dollars.
d. About - 2.23 dollars.
e.
About 1.33 dollars.