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A239387
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Decimal expansion of the probability of a normal-error variable exceeding the mean by more than six standard deviations.
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9
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9, 8, 6, 5, 8, 7, 6, 4, 5, 0, 3, 7, 6, 9, 8, 1, 4, 0, 7, 0, 0, 8, 6, 4, 1, 3, 2, 3, 9, 8, 0, 4, 2, 0, 1, 8, 6, 6, 9, 7, 9, 1, 2, 4, 9, 9, 7, 9, 0, 2, 8, 7, 2, 2, 4, 7, 7, 0, 1, 5, 2, 1, 6, 1, 7, 5, 4
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OFFSET
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-9,1
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COMMENTS
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The probability P{(x-m)/s > 6} for a normally distributed random variable x with mean m and standard deviation s.
In experimental sciences (hypothesis testing), a measured excursion exceeding background "noise" by more than six standard deviations is considered certain and "experimentally confirmed".
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LINKS
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FORMULA
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P{(x-m)/s > 6} = P{(x-m)/s < -6} = 0.5*erfc(6/sqrt(2)) = erfc(3*sqrt(2))/2, with erfc(x) being the complementary error function.
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EXAMPLE
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9.86587645037698140700864132398042018669791249979028722477...e-10
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MATHEMATICA
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First[RealDigits[1 - CDF[NormalDistribution[], 6], 10, 100]] (* Joan Ludevid, Jun 13 2022 *)
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PROG
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(PARI) n=6; a=0.5*erfc(n/sqrt(2)) \\ Use sufficient realprecision
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CROSSREFS
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KEYWORD
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AUTHOR
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STATUS
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approved
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