Re: st: Sum of variables with missing values

[Caleb Southworth <caleb@uoregon.edu>]

On Wed, 8 Apr 2009, Eldon Spackman wrote:

:You could replace missing values with the value 0.
:Eldon

That is a poor practice. Zero often has real meaning. Changing missing 
to zero will alter the mean, if that were important. cf -mvencode- and 
-mvdecode-
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