HP 35s Quick Start Guide

26 Getting Started
To view the average Y value, press Õ to move the cursor over
one space to the right. The average of the Y values is 4.67.
Note: the keystrokes are the same in both ALG and RPN modes.
To view the standard deviation of the X and Y values, press
º+ to view the standard deviation menu. The first two items
are the sample standard deviations of X and Y. The next two
items are the population standard deviations of X and Y.
Figure 15
To use a value from either menu in a calculation, press Ï
when it is displayed. Calculate values for one–variable data in
the same way. For example, to calculate the average of 1, 4,
and 9, press º¡4 then 1/4/9/, followed
by ¹( in either mode.
Linear Regression
The HP 35s can estimate the equation of a straight line that best
fits a set of (x,y) real number data points. For example, suppose
you wish to fit a straight line to these data points: (1,2), (4,5),
and (9,4). These data points are entered the same way as statis-
tical data. First, clear the statistical data registers by pressing
º¡4. Then in RPN mode, enter the data points by

HP 35s Specifications

General

Type	Scientific
Form factor	Pocket
Product color	Black
Digits	14 digits
Display number of lines	2 lines
Keyboard type	Alphanumeric
Menus and prompts	Yes

Weight and Dimensions

Dimensions (WxDxH)	157.9 x 18 x 82 mm