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st: Different p-values


From   Rajaram Subramanian Potty <rajara999@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   st: Different p-values
Date   Thu, 5 Nov 2009 15:52:21 +0530

Dear all,
I am getting different p-values as well as uncorrected chi-square
value when I run tabout and the SVY:tab why. following is the results

. tabout typo icvi ///
> using "D:\My Documents\table1.xls",  c(col) f(4 0)   replace clab(percent Count)svy nla
> b(samplesize) stats(chi2) per
Survey results being calculated
----+--- 1 ---+--- 2 ---+--- 3 ---+--- 4 ---+--- 5
.......
Table output written to: D:\My Documents\table1.xls

        icvi
Type of PSU     1       2       Total   samplesize
        percent percent percent
Home    52.6991 55.7778 54.2406 209
Brothel 20.8022 22.3111 21.5576 109
Public place    26.4987 21.9111 24.2018 97
Total   100.0000        100.0000        100.0000        415

Pearson: Uncorrected chi2(2) = 1.1931
Design-based F(1.45, 74.01) = 7.1319 Pr = 0.004

.
end of do-file

. svy:tab icvi typo, wald
(running tabulate on estimation sample)

Number of strata   =         1                  Number of obs      =       415
Number of PSUs     =        52                  Population size    =   415.441
                                                Design df          =        51

--------------------------------------------------
          |              Type of PSU
     icvi |     Home   Brothel  Public p     Total
----------+---------------------------------------
        1 |    .2631     .1039     .1323     .4993
        2 |    .2793     .1117     .1097     .5007
          |
    Total |    .5424     .2156      .242         1
--------------------------------------------------
  Key:  cell proportions

  Wald (Pearson):
    Unadjusted    chi2(2)         =   13.6306
    Adjusted      F(2, 50)        =    6.6817     P = 0.0027


Thanks and regards,

RAJA
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