Re: REUTERS: Ten Percent Genetic Differences Between Races
DrewDad wrote:That's off by two orders of magnitute from what the article claims.
Not necessarily -- and that's my point.
If two percentages are measured against different bases, there's no way of telling
a priori if one calls the other into question. For example, if I observe that a Cappucino at Starbucks costs about 0.1% of my monthly salary, and then you observe that it costs about 100% percent of Yaya's monthly pocket money, you would never claim that your observation calls mine into question. Your would never say that your observation is three orders of magnitude off of mine. In fact, you and I would have no reason to think there's anything going on here at all. And because you don't suffer from innumeracy, you would know this full well.
Patricia Reaney, by contrast,
does appear to suffer from innumeracy. Her interpretation of the geneticists' publication -- and I'll bet you 10:1 the interpretation is hers -- is an embarrassing misconception of what a percentage is. She writes as if "percent" was a unit of measurement in its own right, when it's really just a fraction of some base value. Consequently, she pretends the two percentages can usefully be compared when they are not -- because they refer to different bases. I think it's as shallow as that.