Turn the calculator on. Enter your data table into a matrix as follows: Press the "2nd," "Matrix." Use the arrow keys to move to the "Edit" menu and select the matrix, usually the first, "1:[A]."
Enter the dimensions of your data matrix. For a matrix of 3 x 5, for example, your calculator screen will read:
Matrix [A] 3 X 5
Enter your observed values by pressing the number and pressing "Enter" after each entry.
Press "Stat" when your data entry is complete. Use the arrow keys to move the cursor to "Tests." Scroll down to the "x2-Test." Press "Enter."
Enter the name of the matrix with the observed frequencies -- [A] in this case --
and name a second matrix, such as [B], in which the expected frequencies will be stored.
Select "Calculate" with the arrow keys and press "Enter." The calculator will return the chi-square, x2, result; the P-value or the probability value; and the df, or degrees of freedom, number.