HP 50g HP 50g_user's manual_English_HDPSG49AEM8.pdf - Page 157

Calculating single-variable statistics, Sample vs. population

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Calculating single-variable statistics After entering the column vector into ΣDAT, press ,Ù @@@OK@@ to select 1. Single-var.. The following input form will be provided: The form lists the data in ΣDAT, shows that column 1 is selected (there is only one column in the current ΣDAT). Move about the form with the arrow keys, and press the soft menu key to select those measures (Mean, Standard Deviation, Variance, Total number of data points, Maximum and Minimum values) that you want as output of this program. When ready, press @@@OK@@. The selected values will be listed, appropriately labeled, in the screen of your calculator. For example: Sample vs. population The pre-programmed functions for single-variable statistics used above can be applied to a finite population by selecting the Type: Population in the SINGLE-VARIABLE STATISTICS screen. The main difference is in the values of the variance and standard deviation which are calculated using n in the denominator of the variance, rather than (n-1). For the example above, use now the @CHOOS soft menu key to select population as Type: and re-calculate measures: Page 16-2

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Page 16-2
Calculating single-variable statistics
After entering the column vector into
Σ
DAT, press
‚Ù
@@@OK@@
to select
1.
Single-var..
The following input form will be provided:
The form lists the data in
Σ
DAT, shows that column 1 is selected (there is
only one column in the current
Σ
DAT).
Move about the form with the arrow
keys, and press the
soft menu key to select those measures (Mean,
Standard Deviation, Variance, Total number of data points, Maximum and
Minimum values) that you want as output of this program.
When ready,
press
@@@OK@@
.
The selected values will be listed, appropriately labeled, in the
screen of your calculator.
For example:
Sample vs. population
The pre-programmed functions for single-variable statistics used above can
be applied to a finite population by selecting the
Type: Population
in
the
SINGLE-VARIABLE STATISTICS
screen.
The main difference is in
the values of the variance and standard deviation which are calculated
using n in the denominator of the variance, rather than (n-1).
For the
example above, use now the
@CHOOS
soft menu key to select population as
Type: and re-calculate measures: