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help for alphawgt
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Cronbach's alpha for weighted data

        alphawgt varlist [weight] [if exp] [in range] [, asis casewise detail
              generate(newvar) item label min(#) reverse(varlist) std ]

by ... : may be used with alphawgt; see help by.

fweights and aweights may be used with alphawgt; see help weights


Description

alphawgt does the same than the official alpha (version 4.5.2, 09apr2002)
except that fweights and aweights may be used. If fweights are used, the sum of
weights is displayed in place of the number of observations (if options detail
and/or item are specified). If aweights are used, the sum of weights is
displayed in addition to the number of observations (if option detail is
specified).

See help alpha for details on options.


Examples

        . alpha q1-q10 [fweight=pop]

        . alpha bg2cost1-bg2cost6 dotest1-dotest6 [aweigth=cellpop], std


Methods and Formulas

See http://fmwww.bc.edu/RePEc/bocode/a/alphawgt.pdf.


Author

Ben Jann, ETH Zurich, jann@soz.gess.ethz.ch

Note: alphawgt is essentially a copy of alpha (version 4.5.2, 09apr2002)
developed by Stata Corporation. I only added some minor modifications. If
alphawgt produces erroneous results due to these modifications, I am to blame
for it.


Also see

 Manual:  [R] alpha
On-line:  help for alpha