Just what is it about prime numbers?  95%...................within two standard deviations...................9 + 5 = 14.........................14i...................but I am making this up....................the R zeta function levels out to one above sea level to the East................


Standard deviation - Wikipedia

https://en.wikipedia.org/wiki/Standard_deviation

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If a data distribution is approximately normal then about 68 percent of the data values are within one standard deviation of the mean (mathematically, μ ± σ, where μ is the arithmetic mean), about 95 percent are within two standard deviations (μ ± 2σ), and about 99.7 percent lie within three standard deviations (μ ± 3σ ...

‎Average absolute deviation · ‎Statistical dispersion · ‎Northern fulmar