The 68-95-99.7 rule states that for a normal distribution, approximately 68% of values fall within 1 standard deviation of the mean, 95% within 2 standard deviations, and 99.7% within 3 standard deviations.
factualpending
Evidence Quote
“about 68% of your values are going to fall within one standard deviation of the mean, 95% of your values, the thing we care about, fall within two standard deviations of the mean, and a whopping 99.7% of your values will fall within three standard deviations of the mean”
Created: 8/10/2026, 3:51:19 PM
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