1.The annual returns, in percentages, on stocks A and B for three possible states of the economy are given in the table below.

Economy State Probability StockA StockB

Good 0.5 40 20

Average 0.3 20 40

Bad 0.2 10 8

If one invested in StockA, what would be the standard deviation of the percentage return? Place your answer, in percent rounded to 1 decimal place, in the blank. For example, a standard deviation of 10.39 percent would be reported as 10.4. Do not use a percent sign

2.The annual returns, in percentages, on stocks A and B for three possible states of the economy are given in the table below.

Economy State Probability StockA StockB

Good 0.5 40 20

Average 0.3 20 40

Bad 0.2 10 8

If one invested in StockA, what would be the expected annual percentage return? Place your answer, in percent, in the blank. For example, an expected 10 percent return would be recorded as 10. Do not use a percent sign

3. The following data were obtained from a survey of college students. The variable X represents the number of non-assigned books read during the past six months.

x 0 1 2 3 4 5 6

P (X=x) 0.55 0.15 0.10 0.10 0.04 0.03 0.03

What is the expected value of X? Place your answer, rounded to two decimal places in the blank. For example, 4.56 would be a legitimate entry.

4. True or False: When rolling two dice, the outcomes “doubles” and “totals 7” are mutually exclusive

5. True or False: If X is a binomial random variable with n = 20, and p = 0.30, then P(X = 10) = 0.50

Subject | Mathematics |

Due By (Pacific Time) | 03/10/2013 09:00 pm |

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