A basic power test in SPSS to determine subjects neede.

Alpha is 0.05.

Effect size is 5

Number needed?

How do i do this in SPSS??

Thanks,

not everyone at once....

I'm not sure you can do power analysis in SPSS, but there are plenty of online calculators available - e.g.:

http://www.dssresearch.com/toolkit/spcalc/power.asp

I think that power is an add-on nowadays to SPSS...

Check this.
> http://pages.infinit.net/rlevesqu/SampleSyntax.htm#SampleSize