Hi

I have a data set of roughly 50 companies - each were asked to state the percentage of their work that they would classify as 'green' in nature. I want to run a test to show that over the sample, this differs from 50%, i.e. on average there is not an even balance between green and non-green work being done.

If this was a normally distributed variable, I'd run a standard one-sample t-test - however the distribution is fairly positively skewed (most companies seem to report between 10-30% - a few report higher), but with a small spike at 100%. Therefore at the very least trying a non-paramtric equivalent alongside a t-test seems appropriate - however going through the SPSS menus I can't find the non-parametric equivalent to the one-sample t-test. Any ideas/refernces - I'm sure I'm missing something obvious here!

Thanks in advance for any help

Chris _________________________________________________________________ Tell us your greatest, weirdest and funniest Hotmail stories http://clk.atdmt.com/UKM/go/195013117/direct/01/