Help with Normal Distribution
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Help with Normal Distribution

[From: ] [author: ] [Date: 11-12-09] [Hit: ]
......
In a normal distribution with mean m and standard deviation s, what percent of the data fall below the value m + s?

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z = (x - µ) / σ

x = m + s
µ = m
σ = s

z = (x - µ) / σ
z = (m + s - m) / s = 1

z-score index table for z = 1
P(z = 1) = 0.841345
P( x < (m + s) ) ≈ 84.13%

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