Wendell Joice
> -chitesti- works fine; I need to tabulate the variables of
> interest and then key in the frequencies to -chitesti-.
>
> Perchance, however, is there a command (other than and not
> as elaborate
> as -collapse-), that will produce a variable B containing
> the frequencies of
> the values in variable A? That way, I can place variable B directly
> into -chitest- .
>
> Unless, of course, you know of a one-sample test that will
> carry out the
> entire process of calculating the frequencies of the
> values of a specified
> categorical variable and then provide a one-sample
> chi-square over those
> frequencies? (Analogous to -tabulate- for two sample chi square)
>
-chitest- is able to do this for you. Here is
a silly example for the simplest case of equal
expected frequencies.
. chitest rep78, count
Chi-square test:
observed frequencies from rep78
expected frequencies equal
Pearson chi2(4) = 33.3913 Pr = 0.000
likelihood-ratio chi2(4) = 34.7183 Pr = 0.000
residuals
+-----------------------------------------+
| observed expected classic Pearson |
|-----------------------------------------|
1. | 2 13.800 -11.800 -3.176 |
2. | 8 13.800 -5.800 -1.561 |
3. | 30 13.800 16.200 4.361 |
4. | 18 13.800 4.200 1.131 |
5. | 11 13.800 -2.800 -0.754 |
+-----------------------------------------+
What -chitest- can't do is count values which
could be there in principle but which in
practice don't occur (cells with observed 0,
in short).
I suspect there are other problems, but at worst
you need to type a few numbers at -chitesti-.
If this doesn't solve the problem, please give
a clear example of the data structure you have in
mind.
Nick
[email protected]
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