Table properties: Statistics

Use the options in the Statistics tab to add statistical tests to your tables. See Applying statistical tests for more information.

To display this tab, choose Tables > Properties from the menu, and then click the Statistics tab.

Fields on the Statistics tab

Significance level

Select a significance level for the net difference, paired preference, column proportions, or column means tests. The default level is 5%, indicating a 95% probability that the results are statistically significant.

Significance level low

If you want to perform the column proportions or column means test at two levels of significance, select a second significance level. By default, significance level low is not set. Note that the value you select in this field must be larger than that for the first significance level.

Small base

By default, tests on rows or columns where the base is above the minimum base but below 100 are carried out, but an asterisk (*) appears next to the result to indicate that the base size is small. You can enter a new value for the small base if required.

Minimum base

By default, tests are not carried out on rows or columns where the base is below 30. Two asterisks (**) are put in the cell to indicate this. You can change the value for the minimum base if required. For some tests, results obtained with bases of less than 30 might not be statistically valid.

Column Test

Choose this button if you want to select the columns to test in a column proportions or column means test, to display the Column Test dialog box.

For weighted reports use the effective base (recommended)

Select this option if you want UNICOM Intelligence Reporter to use the effective base rather than the simple weighted base in statistical tests on weighted tables. This option has no effect on statistical tests run on unweighted tables.

Set as Default

Click this button to use the changes you make on this tab as the default settings for all new tables that you create.

Apply

Choose this button if you have finished adding statistical tests on this tab, but want to change any settings on the Hide or Sort tabs on the Table Properties dialog. If your changes result in the addition of any items that can be hidden or sorted (such as the minimum p value column), using the Apply button adds these items to the lists in the relevant tabs, avoiding the need to close and reopen the dialog.

Restore to Defaults

Sets all the properties for the selected tables to their default values. This affects all the properties in the dialog, not only the ones on the current tab.

See also