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January 31, 2015

January 31, 2015

Posted by **Shawna** on Monday, September 20, 2010 at 1:36am.

1. Display the data in a stem-and-leaf plot.

2. Find the mean.

3. Find the median.

4. Find the mode.

5. Find the range.

6. Find the variance.

7. Find the standard deviation.

- Statistics -
**TutorCat**, Monday, September 20, 2010 at 1:45amhttp://www.purplemath.com/modules/meanmode.htm

http://www.mathsisfun.com/standard-deviation.html

- Statistics -
**PsyDAG**, Monday, September 20, 2010 at 11:04amFind the mean first = sum of scores/number of scores

Subtract each of the scores from the mean and 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

Mode = most frequently observed score.

For median, arrange scores in order of value. Middle-most score = median. If two middle-most scores, mean of those two scores = median

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