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realitybend
07-11-2008, 08:24 AM
I have a graph that needs a lower control limit of 3 standard deviations of a certain group of data. I need to be able to select which data is used to determine the control limits, by placing an X in the adjacent column. How would I do this?

Thanks.

realitybend
07-21-2008, 10:21 AM
No ideas?

mdmackillop
07-21-2008, 10:32 AM
If you posted a sample of what you have with detailed explanation I could attempt to follow what you're after. As it's 40+ years since I encountered Standard Deviations, my recollection it a bit hazy, and I'm not sure I understood them then!

realitybend
07-21-2008, 11:40 AM
Attatched is an example file.

Thanks!

mdmackillop
07-21-2008, 01:27 PM
Like this?

realitybend
07-21-2008, 02:03 PM
Yep. Thanks!