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Youve observed the following returns on Mary Ann Data Corporations stock over the past five years: 20 percent, 12 percent, 17 percent, 20 percent, and

Youve observed the following returns on Mary Ann Data Corporations stock over the past five years: 20 percent, 12 percent, 17 percent, 20 percent, and 10 percent.

a) what is the variance? (rounded to 5 decimal places)

b) what is the standard deviation? (rounded to 2 decimal places)

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