hmm, these data are very interesting, however i would like to have some more information to further my understanding, it seems that the data fits in to the normal model quite well, however for this type of question it would be necessary to have access to individual data values, or at the least; the mean and standard deviation of a wide unbiased, normalized survey.
for the purpose of this thread, lets use the cancun study; those statistics concluded an average(mean) of 5.9inches with a standard deviation of 0.8 inches. lets assume that this is a representative sample of the adult male population(it is not):
0.1% of men have 2.7-3.5 inches
2% of men have 3.5-4.1 inches
14% of men have 4.3-5.1 inches
33% of men have 5.1-5.9 inches
33% of men have 5.9-6.7 inches
14% of men have 6.7-7.5 inches
2% of men have 7.5-8.3 inches
0.1% of men have 8.3-9.1 inches
meaning in a crowd of 1000 men, on average only 20 men will have a penis longer than 7.5inches, and possibly ONE man will have a penis longer than 8.3 inches.
Though you are normalizing, in the real world, I would think those figures you are guessing would be likely. And again, like I had explained before, the Cancun study is only likely to be biased on the higher side.
And yeah, such analysis could possibly be used for a more noble cause (bra fittings, for instance) but penis size is global problem with little insight, isn't it? While not exactly as serious as bubonic plague, you'd be surprised how many people's heads screw around with them regarding penis sizes.
Somewhat off topic, but thought I would mention. While modern society is obsessed with large penises, ancient civilizations such as Greek and Romans were always after compact, aesthetic penises. Large penises were assigned to the uncouth, illiterates and freaks. How times have changed. :tongue: