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OpenStudy (anonymous):
Given a mean of 259 and a standard deviation of 229.1, what is the z-score of the value 78 rounded to the nearest tenth? a.0.8 b.0.6 c.–0.6 d.–0.8
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OpenStudy (tkhunny):
Have you considered subtracting and dividing?
OpenStudy (anonymous):
subtracting what?
OpenStudy (tkhunny):
Do you have a definition of a z-score? It is calculated how from a mean and a standard deviation?
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