Apple iWork '09 - Manual (Page 294)

Related Topics
For related functions and additional information, see:
“STDEV” on page 290
“STDEVA” on page 291
“STDEVPA” on page 294
“VAR” on page 298
“VARA” on page 300
“VARP” on page 302
“VARPA” on page 303
“Survey Results Example” on page 362
“Listing of Statistical Functions” on page 225
“Value Types” on page 36
“The Elements of Formulas” on page 15
“Using the Keyboard and Mouse to Create and Edit Formulas” on page 26
“Pasting from Examples in Help” on page 41
STDEVPA
The STDEVPA function returns the standard deviation, a measure of dispersion, of a
collection of values that may include text and Boolean values, based on the population
(true) variance.
STDEVPA(value, value…)
 value: A value. value can contain any value type.
 value…: Optionally include one or more additional values. All numeric values must
be of the same type. You cannot mix numbers, dates, and duration values.
Usage Notes
It is appropriate to use STDEVPA when the specified values represent the entire Â
collection or population. If the values you are analyzing represent only a sample of a
larger population, use the STDEVA function.
STDEVPA assigns a value of 0 to any text value, 0 to the Boolean value FALSE, and 1
Â
to the Boolean value TRUE and includes them in the computation. Empty cells are
ignored. If you do not want to include text or Boolean values in the computation,
use the STDEVP function.
294 Chapter 10 Statistical Functions