Minitab displays two chi-square statistics.
Pearson chi-square statistic:
Likelihood-ratio chi-square statistic:
If any cell has an expected frequency less than one, the p-value for the test is not displayed because the results may not be valid. If some cells have small expected frequencies, consider combining or omitting row and/or column categories.
Yates' correction for 2 x 2 tables is not used.
|Oij||observed frequency in cell (i, j)|
expected frequency for cell (i, j)
| r ||number of rows|
| c ||number of columns|
The degrees of freedom associated with a contingency table possessing r rows and c columns equals (r – 1)(c – 1).