Unformatted text preview: are given (the wall street journal interactive edition subscriber study, 1999) Probability Number of Comps Laptop Desktop 1 2 3 .47 .06 .45 .56 .06 .28 .02 .10 a. What is the expected value of the number of computers per household for each type of computer? b. What is the variance of the number of computers per household for each type of computer? c. Make some comparisons between the number of laptops and the number of desktops owned by the Journal’s subscribers....
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 Winter '09
 Brian
 Journal Interactive Edition

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