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Unformatted text preview: to be high and a ﬁveyear return of in excess of 300% to be high. Nine of the funds had oneyear returns in excess of 50%, seven of the funds had ﬁveyear returns in excess of 300%, and ﬁve of the funds had both oneyear returns in excess of 50% and ﬁveyear returns in excess of 300%. a. What is the probability of a high oneyear return? What is the probability of a high ﬁveyear return? 2 b. What is the probability of both a high oneyear return and a high ﬁveyear return? c. What is the probability of neither a high oneyear return nor a high ﬁveyear return? The following table provides a probability distribution for the random variable x . x f ( x ) 3 .25 6 .50 9 .25 a. Make a graph of the probability distribution. b. Compute E ( x ), the expected value of x . 3 c. Compute σ 2 and σ , the variance and standard deviation of x . 4...
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 Fall '10
 Jager,AbigailL
 Counting, Probability, Standard Deviation, Variance, high oneyear return

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