On 7 Jul 2003 09:03:02 -0700, [EMAIL PROTECTED] (KR) wrote: > If I have two different surveys from which I calculate values of P1 > and P2, would Cov[P1, P2]=0? The two surveys were performed in > different years and have different sample sizes.
As near as I can figure - you have "Missing data" and no computation. Vector one is length s, Vector 2 is length t, and the combined vector is (s+t) with "missing" for the corresponding values. I somewhat suspect that you have an application where you *might* want to fill in an estimated value for a correlation.... this is all that I can make of the question. -- Rich Ulrich, [EMAIL PROTECTED] http://www.pitt.edu/~wpilib/index.html "Taxes are the price we pay for civilization." Justice Holmes. . . ================================================================= Instructions for joining and leaving this list, remarks about the problem of INAPPROPRIATE MESSAGES, and archives are available at: . http://jse.stat.ncsu.edu/ . =================================================================
