Katja Wunderlich writes:
> Is it OK to do a regression analysis, when the sizes of the sub
> samples are very unequal?
>
> This is our sample with the sub samples:
>
> Germany GB France Italy
> Denmark Poland Total
>
> Interviewed (absolute) 500 407 420 343 101 253 2024
A lot depends on your research hypothesis, but the general rule is that unequal sample sizes are usually not a problem. Sometimes the formulas are a bit more complex when, but the computer handles all of that. You may also lose a bit of precision for certain comparisons.
One concern is when you have unequal variability in groups of unequal size. Neither is much of a problem by itself, but in combination they can sometimes be troublesome.
Sorry if that was such a vague answer. If you share with us your research hypothesis, we may be able to better answer your question.
Steve Simon, [EMAIL PROTECTED], Standard Disclaimer.
The STATS web page has moved to
http://www.childrens-mercy.org/stats.
