Often said most genetic variaty withing race.often said it to be 85% inside to outside race( probably white to afro america) and 88% white to east asian.This are the same that say 99.9% races the same when later found out bigger sample of populations tested bantu to chinese 0.3 and white to bantu 0.23 and white to west african 0.15 and afro american 0.12 rounded to 0.1 differnce to white.What does this mean in standard deviations 50 % at 0 sd and 13.7% above 1 sd 2.3 % above 2 sd 1/740 above 3 and 1/30000 above 4 and 1 in 3.4 million above 5 and 1 in billion same but then under for -1 -2 etc. So for humans races it is to little over 5 distruted .15% of -6 to 6 is 1.5 is 1.8 and for 50% point is 0.9 sd. So average of all differences 0.9 sd this is quite shocking big to me when I realise now . Now some things I have just have to find yet in which white and black average is identical twin lol. average leg is 52% of height for whites and 5.4 % sd black 4% longer legs same height is 4/5.4 is is 0.75 sd (just a nice illustration of the medium) calves could be 1 sd bigger in whites ,just a Guess put probably isn't far off fastest black white 100 meter differnce is 4% and 1 sd speed is 5.3% or so time so also close 3/4 sd. top speed is 7% or so differnce sd 1.25(first 20 meters acceleration close to twin maybe) very easily detected in soccer when I played a selective amateurs in the differnce is the fastest part of the sprint was distributed.I think whites have better sprint endurace so 80 to 100 meter could be 6.5% in stead of 7% differnce. Confidence when meauring things 60% of whites and 82% of blacks tought they where average to good I remember in differnt task math etc. so 0.65 sd( which seems a bit low but maybe they relatyvely modest thinkers of themselves as school performers) Intelligence 100 for whites and 85 iq for afro americans with 15 for sd in whites is 1 sd( only taking in very G loaded genetic based on twins parts( mtach science ) and taking out cultural influenced parts like verbal it is probably like 1.25 sd.Variation of these sample 0.65 to 1.25 sd. It looks like sprinting top speed away from animal of afro americans ( east africans aren't fast sprinters but very differnt slow high grass ground there)and intelligence we are selected the most different.I dont say in indivdully things sub races or races that differ less% can differ more. In some things like sprinting whites and afro americnas or west africans could have more in common then west to east africans becuase of very differnent ground for the feet( sorry for my poor english) but overall much more in common west east african which you would expect genetically. Just as arab to white( espacially dutch with 3 thick rivers and sea in small country ) temperament vs down to earth( altrough the real opposite of temperament is nuchter but can't be exactly translated becuase it is typically dutch) is hugely differnt becuase arabs had to come up for themselves about who get's the water in the sand places and close sahara perhaps lol when the most important ingredient for humans in holland is and was everywhere and it's raining a lot too. the 3/4 average differnce is most prominent in ends of sd like where 5 sd is 100 times less common then 4 and also at the end 0.75 on average is more at end bell curve becuase lowers medium shrinks down sd often if not always linear.