Inferential Statistics

 

A chi-square test can be used to test whether there is any relationship (contingency) between diet and outcome. The calculations for the test are relatively easy and can be done with a hand calculator. The resulting chi square is 16.55 on 3 degrees of freedom. The associated probability value is 0.0009. An Excel worksheet showing how to do the problem can be obtained here.

It can be concluded that outcome is related to diet, and that the Mediterranean diet is superior.