No, because IQ is automatically set so the mean is 100 and the probabilistic distribution moves down in standard deviations of 15. 70 isn't the floor, it's just where the lowest tail is guaranteed to be and everything beyond it will be outliers like people who have down syndrome or are brain dead.
An individual scoring as an outlier isn't weird, an average of a population doing so is. Especially if we're scoring an average against another average. They're saying that if you take an adult American who hasn't advanced past 1st Grade they would crush 75% of Liberia by nearly two more standard deviations. It's mathematically implausible even if we can fathom it for an individual. Hence why the original tweet tries to claim that the majority of Liberians can't even cook their own food, count beyond five or understand metaphors. It's an absurd claim.
A Liberian average of 45 means that the smartest Liberians are almost two standard deviations below the average American because the Liberian high tail would be 75IQ American. They're arguing that the two populations at the five points look like this on the same scale:
70 - 85 - 100 - 115 - 130
15 - 30 - 45 - 60 - 75
It's a bell curve distribution so the five points aren't equal fifths of the population, the population instead decreases away from the mean. So almost the entire population of Liberia would be stupider than the stupidest Americans, stupider than the average American six year old, etc. An IQ survey probably has never shown this for any representative population without some kind of disorder.
An individual scoring as an outlier isn't weird, an average of a population doing so is. Especially if we're scoring an average against another average. They're saying that if you take an adult American who hasn't advanced past 1st Grade they would crush 75% of Liberia by nearly two more standard deviations. It's mathematically implausible even if we can fathom it for an individual. Hence why the original tweet tries to claim that the majority of Liberians can't even cook their own food, count beyond five or understand metaphors. It's an absurd claim.
A Liberian average of 45 means that the smartest Liberians are almost two standard deviations below the average American because the Liberian high tail would be 75IQ American. They're arguing that the two populations at the five points look like this on the same scale:
70 - 85 - 100 - 115 - 130
15 - 30 - 45 - 60 - 75
It's a bell curve distribution so the five points aren't equal fifths of the population, the population instead decreases away from the mean. So almost the entire population of Liberia would be stupider than the stupidest Americans, stupider than the average American six year old, etc. An IQ survey probably has never shown this for any representative population without some kind of disorder.
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