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26-03-2018
Mathematics

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A score that is 12 points below the mean corresponds to a z-score of z = -3.00. What is the population standard deviation?

Respuesta :

26-03-2018

standard deviation=4.

let the mean be 12 and the score be 0 (therefore 12 point difference.)

0-12/s=-3 (s being standard deviation)
-12/4 = -3

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