Statistics Output Browser

The Statistics node output browser displays the results of the statistical analysis and enables you to perform operations, including selecting fields, and generating new nodes based on the selection, and saving and printing the results. The usual saving, exporting, and printing options are available from the File menu, and the usual editing options are available from the Edit menu. See the topic Viewing output for more information.

When you first browse Statistics output, the results are expanded. To hide results after viewing them, use the expander control to the left of the item to collapse the specific results you want to hide or click the Collapse All button to collapse all results. To see results again after collapsing them, use the expander control to the left of the item to show the results or click the Expand All button to show all results.

The output contains a section for each Examine field, containing a table of the requested statistics.

• Count. The number of records with valid values for the field.
• Mean. The average (mean) value for the field across all records.
• Sum. The sum of values for the field across all records.
• Min. The minimum value for the field.
• Max. The maximum value for the field.
• Range. The difference between the minimum and maximum values.
• Variance. A measure of the variability in the values of a field. It is calculated by taking the difference between each value and the overall mean, squaring it, summing across all of the values, and dividing by the number of records.
• Standard Deviation. Another measure of variability in the values of a field, calculated as the square root of the variance.
• Standard Error of Mean. A measure of the uncertainty in the estimate of the field's mean if the mean is assumed to apply to new data.
• Median. The "middle" value for the field; that is, the value that divides the upper half of the data from the lower half of the data (based on values of the field).
• Mode. The most common single value in the data.

Correlations. If you specified correlate fields, the output also contains a section listing the Pearson correlation between the Examine field and each correlate field, and optional descriptive labels for the correlation values. See the topic Correlation Settings for more information.

Generate menu. The Generate menu contains node generation operations.

• Filter. Generates a Filter node to filter out fields that are uncorrelated or weakly correlated with other fields. See the topic Generating a Filter Node from Statistics for more information.