Question

Write down the statistic that measure, how well the frequencies of one nominal variable predict the frequencies of another variable?

Answer 1

Chi - square statistic

Explanation:

To determine how well the frequencies of one nominal variable predict the frequencies of another variable, we use Pearson's chi-square statistic test.

This is because, a chi-square (χ2) statistic is a measure of the difference between the observed and expected frequencies of possible outcomes of a set of variables. In addition to that, it depends on the size of the difference between the actual values, observed values, sample size and the degrees of freedom.

In the words of our question, we can simply say it is used to test whether two variables are dependent or independent from one another.