Howtosignalprocessing
(Please note: a chi-square statistic can't be negative because nominal variables don't have directionality. If your obtained statistic turns out to be negative, you might want to check your math.)
- Are chi-square always positive?
- What makes a chi square test invalid?
- Can a chi-square statistic be 0?
- Can a critical value for the x2 test be negative?
Are chi-square always positive?
An important thing to note about the Chi-Square Statistic is that this value is always positive because when we have the dataset and we are evaluating the statistic, even though we will have positive values and might have negative values as well in the dataset, those values are squared.
What makes a chi square test invalid?
The Chi square test used in the Contingency platform requires at least 80% of the cells to have an expected count greater than 5 or else the sum of the cell Chi squares will not have a Chi square distribution and so your test (p-value) will not be valid. The usual, simple solution in such cases is to combine levels.
Can a chi-square statistic be 0?
Chi-square ranges from 0-infinity. A 0 means the two variables are completely independent. No relationship whatsoever between the two variables. Chi-square is a cell by cell comparison of the expected and observed frequencies in a crosstabular table.
Can a critical value for the x2 test be negative?
Answer and Explanation: "The values of a chi-square test cannot be negative." It is evident from the given test statistic that the value of the test statistic cannot be negative as the difference of expected and observed frequencies is squared.
