How to Find the Mean, Median, and Mode on the TI-84 Evo

The TI-84 Evo has a built-in tool that gives you the mean and median at once, and the mode takes one extra step.

Enter your data into a list

  1. Press the STAT key and choose 1: Edit. This opens the list editor, a grid of columns named L1 through L6.
    The TI-84 Evo keyboard with the STAT key highlighted
  2. Type your numbers into column L1, pressing ENTER after each. Here we'll use five test scores: 95, 80, 100, 85, 80.
    Five test scores entered in column L1 of the TI-84 Evo list editor: 95, 80, 100, 85, 80

If L1 already has numbers in it, move the cursor up onto the L1 label at the top of the column, press clear, then press the down arrow. That empties the column so you can start fresh.

Calculate the mean and median

  1. Press the STAT key again. Arrow right to the CALC tab and press enter to choose 1-Var Stats, the one-variable statistics tool.
    The STAT CALC menu on the TI-84 Evo with 1: 1-Var Stats highlighted
  2. Make sure LIST reads L1, then press ZOOM to run CALCULATE. If LIST shows a different list, press clear, then 2nd and 1 to set it to L1.
    The 1-Var Stats setup screen on the TI-84 Evo showing LIST set to L1 and the CALCULATE button
    The TI-84 Evo top key row with the zoom key highlighted
  3. Read the mean off the top line. x̄ is the mean; for these scores it's 88.
    TI-84 Evo 1-Var Stats results with x-bar equals 88 highlighted, the mean
  4. Press the down arrow to scroll down. Med is the median; for these scores it's 85.
    TI-84 Evo 1-Var Stats results scrolled to show Med equals 85 highlighted, the median

Find the mode

The calculator doesn't find the mode for you, but a quick sort of the list makes it easy to spot.

  1. Press the STAT key and choose 2: SortA(. Enter L1 by pressing 2nd then 1, then press enter. The calculator sorts L1 into ascending order and reports Done.
    SortA(L1) entered on the TI-84 Evo home screen, returning Done
  2. Open the list editor again with STAT, then 1: Edit. Now that the list is sorted, the same numbers sit next to each other, so scroll through and find which number repeats the most times in a row. Here, 80 shows up twice, so 80 is the mode.
    TI-84 Evo list editor showing L1 sorted to 80, 80, 85, 95, 100 with 80 repeated

Good to know

  • Each measure has its own command. On the home screen, press 2nd then stat to open the LIST menu and arrow to MATH. mean(L1) returns the mean on its own, median(L1) the median, and max(L1)−min(L1) gives the range directly, useful when you only need one number.
  • Working from a frequency table? When your data comes as values with how often each one occurs, type the values in L1 and the counts in L2, then on the 1-Var Stats screen arrow down to FREQLIST and press 2nd then 2 for L2 before you press zoom.