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Analyze Two-Variable Statistical Data on the TI-83 Plus

The TI-83 Plus graphing calculator can perform one- and two-variable statistical data analysis. For two-variable data analysis, the data variable for the first data list is denoted by x and the data variable for the second data list is denoted by y.

To analyze two-variable data, follow these steps:

  1. Store your data in the calculator.

    Your data does not have to appear in the Stat List editor to analyze it, but it does have to be in the memory of the calculator.

  2. Press

    image0.png

    to select the 2-Var Stats command from the Stat Calculate menu.

  3. Enter the name of your data list (Xlist).

    If your data is stored in one of the default lists L1 through L6, press [2nd], key in the number of the list, and then press [ENTER]. For example, press [2nd][1] if your data is stored in L1.

    If your data is stored in a user-named list, first press

    image1.png

    to insert the letter L and then enter the name of the list. Inserting the letter L tells the calculator that what follows this letter is a data list. To enter the name of the list, use the [ALPHA] key to insert letters.

  4. Press [,] and enter the name of the Ylist.

  5. If necessary, enter the name of the frequency list.

    If the frequency of your data is 1, you can skip this step and go to the next step. If, however, you stored the frequency in another data list, press [,] and then enter the name of that frequency list (just as you entered the Xlist in Step 3).

  6. Press [ENTER] to view the analysis of your data.

    Use the

    image2.png

    keys to view the other values that don’t appear on the screen.

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