HP 20b HP 20b Calculator Quick Start Guide - Page 38
Prediction X month.
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Statistical Operations Table 3-2 Statistics Example Keys < Display I
Statistical Operations
38
Table 3-2
Statistics Example
Keys
Display
Description
<
Opens Descriptive sub-
menu.
I<<
Displays current value for y
average.
:z<<
I
Opens Predictions sub-menu
starting with
Linear
.
<
Scrolls to current value of
Prediction X.
7I
Inputs current value for
Prediction X (month).
<=
Calculates predicted Y value
(sales).
<
Displays current value for
slope.
<
Displays current value for y-
intercept.