Chi Square Test Table Degrees Of Freedom. The degrees of freedom is equal to rows 1 columns 1 2 1 3 1 2 and the problem told us that we are to use a 0 05 alpha level. Take the number of rows minus one and multiply that number by the number of columns minus one.
P Value Chi Squared Table P Value Chi Square Probability from www.pinterest.com
The resulting figure is the degrees of freedom for the chi square test. Or just use the chi square calculator. The significance level α is demonstrated with the graph below which shows a chi square distribution with 3 degrees of freedom for a two sided test at significance level α 0 05.
If the test statistic is greater than the upper tail critical value or less than the lower tail critical value we reject the null hypothesis.
The χ2 value 23 57 and the degrees of freedom df. It turns out that the test statistic for this chi square test is 0 864. For two sided tests the test statistic is compared with values from both the table for the upper tail critical values and the table for the lower tail critical values. But it may not be immediately clear why this is the correct number of degrees of freedom.
