Control charts - Seeking known data set to confirm my software

D

DJN

I have put together a spreadsheet that does an average and range control chart together with descriptive statistics. The control chart part works fine, however, I am unsure whether the descriptive statistics section is giving me the correct results. I have compared my results with a software package we are trialing and the results seem a little off. No great discrepancies, but enough for concern.Question. Does anybody have data and results that are proven, so that I can plug the data into my spreadsheet?
 
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