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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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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