SOLUTION: Kori is analyzing a normal data distribution, but the data provided is incomplete. Kori knows that the mean of the data is 120, and that 84% of the data values are less than 130. F

Question 1117731: Kori is analyzing a normal data distribution, but the data provided is incomplete. Kori knows that the mean of the data is 120, and that 84% of the data values are less than 130. Find the standard deviation for this data set.
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Kori is analyzing a normal data distribution, but the data provided is incomplete. Kori knows that the mean of the data is 120, and that 84% of the data values are less than 130. Find the standard deviation for this data set.
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z = (x-u)/sigma
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Find the z-value.
z = invNorm(0.84) = 0.9945
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Equation:
0.9945 = (130-124)/s
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std = 6/0.9945 = 6.0334
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Cheers,
Stan H.
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