Hi Rick,
My maths knowledge isn't great - just one statistics course at university and it certainly wasn't an advanced one - so I'm more than open to correction.
My understanding is that if it was percentage then 75 would mean three-quarters, if it is proportion then 0.75 would mean three-quarters. I tested it and .75 gives the right result whereas 75 gives the wrong result (or possibly an error, I don't recall). Still, I am not a statistician and will not hesitate to accept guidance from someone who knows better.
Iain.
Rick Barnes wrote:
The "Appendix C: Description of Functions" chapter for the Calc guide has be edited and uploaded again. Please read the text in red at the beginning of the chapter...this is fairly technical work, but grammatical editing in desperately needed, too.
The only changes that I was hesitant to make that were suggested are in the listing for the Statistical function, TRIMMEAN:
Returns the mean of a data set without the Alpha proportion (removed "percent") of data at the margins. Data is the array of data in the sample. Alpha is the proportion (removed "percentage") of the marginal data that will not be taken into consideration.
Even though I took 3 semesters of Statistics, including Grad school, I'm at a loss. I am not sure if "proportion" and "percent are interchangeable?
