Thanks for the reply Felicity, as a side Roger has been known to post on another forum at times and I think even here once or twice. I believe he hails from Tassie?

Could you just expand on what you mean by relative frequency? I understand what it is, but how would you use and apply it in this scenario?

Thanks.

[ This Message was edited by: Chrome Prince on 2004-05-22 18:05 ]