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Page 16-2

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:

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HP 50g User Manual Page 157