No, 10 shots is not a statistically relevant or valid sample; you would need a 30 shot sample, or a series of 10 shot samples combined into one group, to be a statistically valid sample & to be statistically representative of the variability of the system; in this case, the system is the gun, the ammo, the sights & the shooter & I guess you could throw in the weather/wind, especially with a 22 caliber.
That depends on the difference in your standard deviations. It takes a sample size of 30 to move from the T table to the Z table, but that does not mean you cannot achieve statistically significant results with a smaller sample.
You didn't use logic or reason to get into this opinion, I cannot use logic or reason to get you out of it.
You cannot over estimate the unimportance of nearly everything. John Maxwell
