Spencer Graves <[EMAIL PROTECTED]> writes: > p.s. I don't see how it's obvious that 'a=-c'."
> > Y=a+bX+cX^2+dX^3, where X~N(0,1). (Y is expressed as a linear combination > > of the first three powers of a standard normal variable.) Assuming that > > E(Y)=0 and Var(Y)=1, one can obtain the following equations after tedious > > algebraic calculations: Take means on both sides: EY = a+0+c+0 = 0 -- O__ ---- Peter Dalgaard Øster Farimagsgade 5, Entr.B c/ /'_ --- Dept. of Biostatistics PO Box 2099, 1014 Cph. K (*) \(*) -- University of Copenhagen Denmark Ph: (+45) 35327918 ~~~~~~~~~~ - ([EMAIL PROTECTED]) FAX: (+45) 35327907 ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
