#### 7.7.6 Statistical Functions

Statistical functions compute descriptive statistics on a list of
values. Some statistics can be computed on numeric or string values;
other can only be computed on numeric values. Their results have the
same type as their arguments. The current case's weighting factor
(see WEIGHT) has no effect on statistical functions.

These functions' argument lists may include entire ranges of variables
using the `var1`` TO `

`var2` syntax.

Unlike most functions, statistical functions can return non-missing
values even when some of their arguments are missing. Most
statistical functions, by default, require only 1 non-missing value to
have a non-missing return, but `/NAME/`

, `/NAME/`

, and `/NAME/`

require 2.
These defaults can be increased (but not decreased) by appending a dot
and the minimum number of valid arguments to the function name. For
example, `MEAN.3(X, Y, Z)`

would only return non-missing if all
of ‘`X`’, ‘`Y`’, and ‘`Z`’ were valid.

— Function:

**CFVAR** (

`number, number`[

`, ...`])

Results in the coefficient of variation of the values of `number`.
(The coefficient of variation is the standard deviation divided by the
mean.)

— Function:

**MAX** (

`value, value`[

`, ...`])

Results in the value of the greatest `value`. The `value`s may
be numeric or string.

— Function:

**MEAN** (

`number, number`[

`, ...`])

Results in the mean of the values of `number`.

— Function:

**MIN** (

`number, number`[

`, ...`])

Results in the value of the least `value`. The `value`s may
be numeric or string.

— Function:

**SD** (

`number, number`[

`, ...`])

Results in the standard deviation of the values of `number`.

— Function:

**SUM** (

`number, number`[

`, ...`])

Results in the sum of the values of `number`.

— Function:

**VARIANCE** (

`number, number`[

`, ...`])

Results in the variance of the values of `number`.