Using your calculator for Statistics TI-34 calculators 1. You need to change the Mode function on your calculator to SD (statistical data) by pressing: MODE (yellow bar) and 5 (SD sould appear on the upper right corner of the screen) 2. Before each calculation you need to clear the memory that contains the statistical data. You can do that by pressing AC/ON 3. Entering data points without frequency Example data: 5, 8, 12, 4, 23 Press: Display shows: 5 Sigma+ 1 8 Sigma+ 2 12 Sigma+ 3 4 Sigma+ 4 23 Sigma+ 5 To find the mean press: 2nd 4 10.4 To find the standard deviation press: 2nd 5 7.7 To find the variance press x2. (square the standard deviation) 59.3 4. Entering data points with frequency is not possible with this calculator