I don’t want to sound like a snob, but anyone who has studied statistical theory at the graduate level would have came to similar conclusions in a short amount of time as what’s mentioned in that link. I even showed a round about application of it except I made it multivariate distribution and I’ve never read his work. I guess he might have been the first to apply it to firearms?
Edit: I acknowledge I’ve had the benefit of standing on the shoulders of giants so it’s not really fair to compared now VS then.
I don't believe Grubbs was a world beating statistician but, he did do a lot in the area of small arms statistical analysis which I think served to square away statistical theory with regard to minimum sample number calcs in relation to the different testing formats such as CEP, Mean Radius, RSD & etc.
The reason I like to bring Grubbs into conversations is because Grubbs focussed specifically on rifle accuracy &, formulated tables which allow extrapolation from low sample numbers utilizing multiplication factors. Although I will agree that Grubbs tables do not replace robust initial analysis where the all important real world data is established however, these tables are formulated from that real world data & have been accepted as "fit for purpose" in establishing rifle accuracy & repeatability within the bounds of a particular application.
Although I can't speak for Grubbs, I believe one of his goals was to formulate a system which could faithfully extrapolate, within the bounds of realistic confidence & error levels that, would be "fit for purpose" as well as statistically sound within the chosen application framework.
It is my belief that the tables Grubbs formulated are fit for purpose with regard to the average punter & even the average F class & long range shooter to establish a far more worthy & realistic base than the hated, useless single 3 shot group. Even 2 groups of 7 is far superior than a single 3 shot group.
Watching guys on YouTube completely trash a 5K rifle taking single 3 shot groups of different cartridges, proudly displaying their utter ignorance, for all the world to see, not to mention the damage to the rifle builders business & reputation is, simply criminal.
Although I'm not affected personally, I hate injustice & the abhorrent thought that some guys business hangs in the balance based on the words & actions of fools.
Surely the shooting fraternity can do better than this fuckery &, in stating that, I believe Grubbs has brought a balanced compromise, if it is possible to educate these dunces.