Chi Square Test Statistic Formula. For example if the values in the original table went from cell b2 to cell d3 and the formula from step 10 is in cell b6 use the fill down feature to extend this formula to cell d7. They are associated we use the following formula to calculate the chi square test statistic x 2.
The value can be calculated by using the given observed frequency and expected frequency. Square the differences from the previous step similar to the formula for standard deviation. Pearson s chi squared test is used to determine whether there is a statistically significant difference between the expected frequencies and the.
Formula for chi square test.
If the chi square value is large you can reject the null hypothesis. If the chi square value is large you can reject the null hypothesis. Chi square is one way to show a relationship between two categorical variables. Alternative hypothesis the two variables are not independent.
