The chi-squared statistic can best be described as
A)the standardized deviation of observed data from expected data.
B)a statistically significant test.
C)a statistical test used in genetics.
D)a statistical test that compares observed and expected population means.
E)None of these

Question

Quizplus · Accepted Answer

The chi-squared statistic measures the difference between observed and expected frequencies in a categorical data set, and is calculated as the sum of squared differences between expected and observed values divided by expected values. It is commonly used to test the hypothesis that observed data follows an expected distribution or pattern. The chi-squared statistic is not a standardized deviation or a test of population means, and while it can be used in genetics, it is not specific to that field.

The Chi-Squared Statistic Can Best Be Described as