Gather the variables you want to test, as well as the m0 variable that goes with the set. This t-test will find the t-ratio for your sample set.
Press "Stat," then "1" to enter the first list of variables. Enter each one and press "Enter." If any of the variables are smaller than one, make sure you put a zero before it. For example, ".3" should be written "0.3."
Press "2nd" (which activates the second meaning of each button, written smaller above the main ones), and "Mode" to get back to the home screen.
Press "Stat" and use the arrow keys to navigate left to the "Tests" menu. Scroll down or press "2" for the t-test, and scroll right to select "Data." Press "Enter" again.
Enter the m0 number, then scroll down to "Calculate" and press "Enter." The number after the letter "t" is the t-ratio.