In fact..........adding single digits to double digits.................in the 1st two stand deviations from the norm............................add to 14.........like 14i................68% and 95%...........6 + 8 = 14...........9 + 5 = 14...............................and is exactly how the square root of 2 starts out.....................



Percentile - Wikipedia

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What is 68 95 99 rule?

In statistics, the 68–95–99.7 rule is a shorthand used to remember the percentage of values that lie within a band around the mean in a normal distribution with a width of two, four and six standard deviations, respectively; more accurately, 68.27%, 95.45% and 99.73% of the values lie within one, two and three standard ...