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Unformatted text preview: [15] . Let X n be the random variable that counts the dierence in the number of tails and the number of heads when n coins are ipped. Assume that the coins fair, that is, heads and tails occur with the same probability equal to 1 / 2. Compute E [ X n ] and Var [ X n ]. 1...
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This homework help was uploaded on 04/19/2008 for the course CS 182 taught by Professor W.szpankowski during the Fall '08 term at Purdue UniversityWest Lafayette.
 Fall '08
 W.Szpankowski

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