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Stat testing weighted share of preference

I've built a simulator in excel, and have set up t-tests that test for significant difference in share of preference amongst 2 mutually exclusive subgroups. (share of preference = split vote rule, not first choice).

t = (Share_cell1 - Share_cell2)/sqrt (SE_cell1^squared + SE_cell2^squared)
Where SE = standard deviation of respondent level shares/sqrt(n)

I'm now weighting the respondent level shares by volume and reproportioning to yield an Expected Share of Volume.  

I am uncertain of how to calculate SE for this problem.  Would the 'n' I use be the effective base? (sum of volumes)^2 / (sum of squared volumes)?

asked May 1, 2012 by anonymous
retagged Sep 13, 2012 by Walter Williams

1 Answer

0 votes
We have simply counted the number of respondents for n rather than compute "effective base."
answered May 2, 2012 by Bryan Orme Platinum Sawtooth Software, Inc. (180,715 points)