Posted by Jen on Wednesday, October 12, 2011 at 6:28pm.
Z = (score-mean)/SD
SD^2 = variance
Please only post your questions once. Repeating posts will not get a quicker response. In addition, it wastes our time looking over reposts that have already been answered in another post. Thank you.
I apologize...thank you....so is it
A data point of 20 is one standard deviation above the mean of 15, so the standard or "z" score is 1.0
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