HP 20B manual 5I1 70I, Statistical Operations 3Statistics Example

Statistical Operations

Table 10-3Statistics Example

Keys Display Description

5I1

70I

Inputs values for X(5) and Y(5).

:z

<I

<<

:z<<

I

<7I

<=

<

<

<

:z<<

<I<

Opens Stats menu.

Opens Descriptive sub-menu.

Displays average y.

Opens Predictions sub-menu. Note: this example performs calculations based on a linear

(a*X+b) regression line.

Inputs 7 as the Prediction X value (month 7).

Calculates Prediction Y value (sales at month 7).

Displays value for a: the slope of the regression line.

Displays current value for b: the y-intercept of the regression line.

Displays value for Correlation.

Opens Sums sub-menu. Displays the sum of all y values (Sigma Y).

To reset the menu items to their default values, with any item of the Data or Statistics menus displayed press :x. At

the prompt, Stats, press I. Confirm your choice by pressing I.

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