HP 33S User Manual

Statistical Operations
11–7
File name 33s-English-Manual-040130-Publication(Edition 2).doc Page : 388
Printed Date : 2004/1/30 Size : 13.7 x 21.2 cm
Example: Population Standard Deviation.
Grandma Hinkle has four grown sons with heights of 170, 173, 174, and 180 cm.
Find the population standard deviation of their heights.
Keys: Display: Description:
¹ ¡
{

}

Clears the statistics registers.
170
/
173
/
174
/
180
/


Enters data. Four data points
accumulated.
º +
{
σ

}

σ

σ


Calculates the population
standard deviation.
Linear Regression
Linear regression, L.R. (also called linear estimation) is a statistical method for
finding a straight line that best fits a set of
x,y–data.
Note
To avoid a
 
message, enter your data before
executing any of the functions in the L.R. menu.
L.R. (Linear Regression) Menu
Menu Key Description
{

ˆ
} Estimates (predicts) x for a given hypothetical value of y,
based on the line calculated to fit the data.
{

ˆ
} Estimates (predicts) y for a given hypothetical value of x,
based on the line calculated to fit the data.
{

} Correlation coefficient for the (x, y) data. The correlation
coefficient is a number in the range –1 through +1 that
measures how closely the calculated line fits the data.
{

} Slope of the calculated line.
{

} y–intercept of the calculated line.

HP 33S Specifications

General

Type	Scientific
Form factor	Pocket
Product color	Silver
Digits	10 digits
Display number of lines	2 lines
Keyboard type	Alphanumeric
Menus and prompts	Yes

Weight and Dimensions

Dimensions (WxDxH)	157 x 16 x 81 mm