Diagnostics information: Chi-square test

When you run a statistical test on a table, UNICOM Intelligence Reporter can create diagnostics information that shows the p values and some of the intermediate figures used to calculate the statistics. The information is in comma-delimited format, so you can open it in Microsoft Excel and perform calculations on the data. The information varies according to the test. Here is the information for the chi-square test example:

Stats for table 'Table1' row 9 column 9

Columns for Pearson test

formula

The name of the formula used.

rows/cols

The category rows and columns that the test was performed on.

chisqd

The chi-square value.

chidof

The degrees of freedom.

pval

The p value.

Columns for Yatesâ€™ correction

When the Yates' correction is used, the following columns are also present:

absterm

The absolute value of the product of one diagonal minus the product of the other diagonal. When the absterm value is less than the halfsum value, the Yates' value is not calculated and the chi-square value is set to zero.

halfsum

Half the sum of frequencies in all the cells.

fisher2

The two-tailed probability of chi-square as calculated by Fisher's exact test.

fisher1

The one-tailed probability of chi-square as calculated by Fisher's exact test.

See also