Hi Al

>1. Suppose your calculator normally returns the value 10, and you'd like the result to "wobble" between, say, 9 and 11...

Thanks, this is what I had in mind.

>2. Maybe you'd like the "wobble" to look more like a real-world statistical deviation...

That was a tough one. I did look at it, but currently I wanted to go for something quick and dirty.

Thanks for your response.