Statistical Operations
Statistics operations require the use of two secondary function keys: :y and :z. See Figure 3-1 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, w) for weighted, one-variable statistics, or a list of paired values (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 menu displays 2 Vars. Press Irepeatedly to scroll through the menu items, two-variable, (2 Vars ), one-variable, (1 Var ), and one-variable weighted, (1 Weight ). Press <with an item displayed to open the first sub- menu. To return from the sub-menu to the menu above it, press >.
To reset the Stats and Data menus, press :x. At the prompt, Stats=, confirm your choice by pressing I.
The first sub-menu contains the following items: Descriptions, Predictions (2 Vars only) and Sums. Press >or <repeatedly to scroll through the items. With an item displayed, press Ito open its sub-menu. Press >or < repeatedly to view the results.
Note: in one-variable and one-weight items, there are no items for y. For an example using the Stats menu, see Tables 3-1 and 3-2. The example is shown with RPN as the active operating mode.