Statistical Operations
The Data and Stats Menus
Statistics analysis functions are located in the Data and Statistics menus accessible with the :yand :zkeys. See Figure 1 for assistance with navigating through the menus.
Press :yto open the Data menu. In this menu, enter a list of x values for one-variable statistics, a list of pairs, (x, F) for weighted, one-variable statistics, a list of numbers x for one-variable statistics, or a list of pairs, (x, y) for two-variable statistics. To enter data, key in a number and press I.
Press :zto analyze the data. If you attempt to open the Statistics (Stats) menu before entering data, you will be redirected to the Data menu. When opened, the Stats menu displays 2 Vars for two-variable statistics. Press I repeatedly to select the type of statistical operations desired, two-variable, (2 Vars ), one-variable, (1 Var ), or one-variable weighted (1 Weight ).
After selecting the type of statistical operation you want, select a sub-menu by pressing <or >, and press Ito open it. Once in a sub-menu, press <or >repeatedly to view the results. To return from the sub-menu to the Statistics menu, press :z.
Note: in one-variable modes, there are no items for y and the Predictions sub-menu is not available.
Pressing Iwith the Predictions sub-menu displayed opens a sub-menu, in which you can choose among six different types of regression lines. See Figure 1. To select a specific type of regression line in the Predictions sub-menu, press Ito cycle through the options. Note: if you press =, the calculator automatically selects the curve that is the best fit for your data.
Once you select a regression line, press <to see the regression line parameters and perform predictions.