Jane wants to invest some money in stocks of one of two firms. She estimates the probabilities and corresponding dollar returns as follows:

Stock A			Stock B
Probability	$ return		Probability	$ return
0.3	20		0.2	79
0.3	40		0.2	110
0.2	83		0.2	120
0.2	110		0.4	130

Part 3

What is the standard deviation for stock A?

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Attempt 1/20 for 10 pts.

Part 4

What is the standard deviation for stock B?

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Attempt 1/20 for 10 pts.

Part 5

What is the coefficient of variation for stock A?

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Attempt 1/20 for 10 pts.

Part 6

What is the coefficient of variation for stock B?

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