If I'm not mistaken +/- one standard deviation from nominal is IQ 85-115 which is the middle of low and high average (68% of humanity). IQ 70-130 is two +/- standard deviations (95% of humanity). Since we don't wear a red badge of IQ we don't really know the IQ of people we work with beyond levels of perceived competence. I doubt that I…
If I'm not mistaken +/- one standard deviation from nominal is IQ 85-115 which is the middle of low and high average (68% of humanity). IQ 70-130 is two +/- standard deviations (95% of humanity). Since we don't wear a red badge of IQ we don't really know the IQ of people we work with beyond levels of perceived competence. I doubt that I could guess anyone's IQ with accuracy, but then I've never cared to try.
You're not mistaken, those figures are right. And ± 3SDs is 99.7%.
I would swear that in the past it was 10 points that comprised a standard deviation.
I wouldn't try to guess numbers either but there is an unmistakable indication when you're talking to smart people: they grasp what you're saying before you finish the sentence.
If I'm not mistaken +/- one standard deviation from nominal is IQ 85-115 which is the middle of low and high average (68% of humanity). IQ 70-130 is two +/- standard deviations (95% of humanity). Since we don't wear a red badge of IQ we don't really know the IQ of people we work with beyond levels of perceived competence. I doubt that I could guess anyone's IQ with accuracy, but then I've never cared to try.
You're not mistaken, those figures are right. And ± 3SDs is 99.7%.
I would swear that in the past it was 10 points that comprised a standard deviation.
I wouldn't try to guess numbers either but there is an unmistakable indication when you're talking to smart people: they grasp what you're saying before you finish the sentence.