This sounds like a different way of attacking it since http://www.mathhelpforum.com/math-he...tml#post628139

I would use an ANOVA here, but are these really samples? If you have 10,000 digits into 10 groups and your are finding the mean of the whole 1000 then this is the population. Of the 1000 if you only took a random 50 for example then that would be a sample.