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Luis A. Afonso
Posts:
4,743
From:
LIsbon (Portugal)
Registered:
2/16/05


Re: Twosamples difference: semiamplitude vs. sizes
Posted:
Oct 2, 2013 4:42 PM


____1. The total sum of squared deviations, ssd= ssdX + ssdY, does follow a Chi squared n2 df. (n=nX+nY) ERROR: It is true only when sigma=1: otherwise we must multiply the semiamplitude by sigma. This follows from : _____(n1)*s^s/variance = 1/(s^2)* sum (X_i  xhat)^2 follows a chisquared n1 df. Luis A. Afonso



