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Mathematics 13 Online
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

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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