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A score that is 6 points below the mean corresponds to a z-score of z –0.50. what is the population standard deviation?
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A score that is 6 points below the mean corresponds to a z-score of z –0.50. what is the population standard deviation?

User Dziamid
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The minus sign of the z-score shows that the score is below the mean. 6 points below the mean means the difference of the score and mean is -6 z = (X-Mean)/SD -0.50 = -6 / SD SD = -6/-0.50 = 12 The population standard deviation = 12
User Stomy
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