P0073_Soln - VarX = 1-p p 2 = 1-0.2 0.2 2 = 20 VarY = 1-p p...

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P0073_Soln.doc The variance of a RV formed by adding two independent RVs is equal to the sum of the variances of those independent RVs: VarX + Y [ ] = VarX [] + VarY [] The variances of each RV is easily found since they are geometric RVs:
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Unformatted text preview: VarX = 1-p p 2 = 1-0.2 0.2 2 = 20 VarY = 1-p p 2 = 1-0.6 0.6 2 = 1.11 Var X + Y [ ] = Var X + Var Y = 20 + 1 .11 = 21 .11...
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This note was uploaded on 02/01/2011 for the course BME 335 taught by Professor Dunn during the Spring '10 term at University of Texas at Austin.

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