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A population μ=125, and σ=25, how common are values in the 100 – 150 range?
in Statistics Questions by Silver Status (25.1k points) | 25 views

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Z(100)     = (100 - μ) / σ

                = (100 - 125) / 25

                = -1

∴ P(100)  = 0.15866

Z(150)     = (150 - μ) / σ

                = (150 - 125) / 25

                = 1

∴ P(150)  = 0.84134

 

∴ P(100-150) =  0.84134 - 0.15866

                      = 0.68268

                      = Approx. 68.3% commonality
by Wooden (2k points)

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