Please forward this error screen to sharedip-1321489989. This section shows how to use Chi Square to test the relationship between nominal statistic questions for project for significance. For example, Table 1 shows the data from the Mediterranean Diet and Health case study.

Frequencies for Diet and Health Study. The question is whether there is a significant relationship between diet and outcome. The first step is to compute the expected frequency for each cell based on the assumption that there is no relationship. These expected frequencies are computed from the totals as follows. T is the total number of observations. Observed and Expected Frequencies for Diet and Health Study.

The significance test is conducted by computing Chi Square as follows. The Chi Square calculator can be used to determine that the probability value for a Chi Square of 16. 55 with three degrees of freedom is equal to 0. A key assumption of this Chi Square test is that each subject contributes data to only one cell. Therefore, the sum of all cell frequencies in the table must be the same as the number of subjects in the experiment. Consider an experiment in which each of 16 subjects attempted two anagram problems.