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January 25, 2015

January 25, 2015

Posted by **Lisa** on Wednesday, November 30, 2011 at 12:21pm.

12th Grade math class.

organize the data 78,67,95,85,84,86,82,75,85,94,91,57,78,77,88,90,91,86,84,82,75,58,73,75. Then do 4 columns of Grades,Deviations,Squares,and Z-Scores

- statistics -
**PsyDAG**, Thursday, December 1, 2011 at 11:43amFind the mean first = sum of scores/number of scores

Subtract each of the scores from the mean for deviation. Square each difference. Find the sum of these squares. Divide that by the number of scores to get variance.

Standard deviation = square root of variance

Z score = difference/standard deviation

I'll let you do the calculations.

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