How to Analyze Statistical Data on the TI84
The TI84 Plus calculator can perform one and twovariable statistical data analysis. For onevariable data analysis, the statistical data variable is denoted by x. For twovariable 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.
Onevariable data analysis
To analyze onevariable data, follow these steps:

Enter the data in your calculator.
Your list 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.

To activate the 1Var Stats Wizard from the Stat Calculate menu, press

Enter the name of your data list (Xlist).
If your data is stored in one of the default lists L_{1} through L_{6}, press [2nd], key in the number of the list, and then press [ENTER]. For example, press [2nd][1] if your data is stored in L_{1}.
If your data is stored in a usernamed list, press [2nd][STAT], use the up and downarrow keys to scroll through all the stored lists in your calculator, and press [ENTER] to insert the list name you want.

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 Step 5. If, however, you stored the frequency in another data list, enter the name of that frequency list (just as you entered the Xlist in Step 3).

Press [ENTER] on CALCULATE to view the analysis of your data.
This is illustrated in the second screen. Use the up and downarrow keys to view the other values that don’t appear on the screen. See the view after scrolling in the third screen.
Twovariable data analysis
To analyze twovariable data, follow these steps:

Enter the data in your 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.

To activate the 2Var Stats Wizard from the Stat Calculate menu, press

Enter the name of your data list (Xlist).
If your data is stored in one of the default lists L_{1} through L_{6}, press [2nd], key in the number of the list, and then press [ENTER]. For example, press [2nd][1] if your data is stored in L_{1}.
If your data is stored in a usernamed list, press [2nd][STAT], use the up and downarrow keys to scroll through all the stored lists in your calculator, and press [ENTER] to insert the list name you want.

Enter the name of the Ylist.

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 Step 6. If, however, you stored the frequency in another data list, enter the name of that frequency list (just as you entered the Xlist in Step 3).

Press [ENTER] on CALCULATE to view the analysis of your data.
This is illustrated in the second screen. Use the up and downarrow keys to view the other values that don’t appear on the screen.
If you press [2nd][MODE] to dismiss your results, you will find your cursor on a clear Home screen. Press the uparrow key to scroll through your previous calculations and you will find the 2Var Stats command as shown in the third screen. If you plan on using the 2Var Stats command multiple times, save time by highlighting and pressing [ENTER] to paste the command into your current entry line.