Brief presentation on data spread using sugar cube data

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Presentation transcript:

Brief presentation on data spread using sugar cube data Brief presentation on data spread using sugar cube data. Also a demo of using Excel for data exploration. sug-cub-data.xls has data Show summary stats Create scatter plot, manipulate plot Draw red line for mean, dotted line for +/- 1 std dev

For normally distributed data: wikipedia.org For normally distributed data: 68% of the values are within 1 standard deviation of the mean 95% of the values are within two standard deviations 99.7% of the values are within 3 standard deviations.