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#111




can someone explain exercise 4.2 in ASM? Why does E[X^2] = (frequency*(mean^2 + Sigma^2)). Why do we add the mean squared plus sigma squared for the second moment? I've seen this a few times now and must have missed the definition.
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#112




Quote:
Variance = sigma^2 = E[X^2]  (E[X])^2 Rearranging to solve for the second moment: E[X^2] = sigma^2 + (E[X])^2 
#115




I have been trying to study but it's been difficult. I am the kind that knowing how to solve the problem and doing the practice problems becomes boring to me as it is more of a technical regurgitation nature as opposed to learning new stuff, so I am trying to go through the entire manual and summarize key concepts and formulas, then going to try my hand at some practice exams with my review notes. Then after a couple of the practice exams might go back and look at problems that seem different in applying concepts or problems I wouldn't immediately know how to solve. Seemed to work well for MFE the last go around.
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#117




Quote:
Hope that's useful to you, Jefe.
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