#
Statistical Functions

To access the statistical functions, make sure you are in

*Statistics*
mode; the title bar should end with

*[stats]*. If not, click

**mode**
and select

*Statistics* from the Number/Mode group. In statistics
mode, the bottom right hand button on the calculator is

**data**. To
input values for analysis, enter numbers and click

**data** after each
number is input. Repeat this process until you have entered all the data
values. If you press the

**shift** button on the calculator, some of
the number keys change to the statistics functions:

For example, to get the number of points entered, press
; to get the mean of the data, press the
button.

To clear the statistics memory, press **shift** and then press **SAC**
(Statistics All Clear) button (which was labelled AC before pressing **shift**).

##
- Data Input

To input values for analysis, enter numbers and click

**data** after
each number is input. Repeat this process until you have entered all the
data values.

##
- Statistics All
Clear

To clear the statistics memory, press the

**shift** button, followed
by

**SAC** (i.e. shifted

**AC**).

##
- Permutations

Computes the number of permutations nPr.

Example:

To compute the number of ways of arranging five objects chosen from
a population of ten:

**1 0 shift
5 =**

Result: 30240

Note: The calculator must be in statistics mode.

##
- Combinations

Computes the number of combinations nCr.

Example:

To compute the number of combinations of five objects chosen from a
population of ten (without regard to the order of choosing):

**1 0 shift
5 =**

Result: 252

Note: The calculator must be in statistics mode.

##
- Maximum
of data values

To obtain the maximum of all the values entered into the statistics memory,
press

**shift** then

**max**.

##
- Minimum
of data values

To obtain the minimum of all the values entered into the statistics memory,
press

**shift** then

**min**.

##
- Number of Data Points

To obtain the total number of values entered into statistics memory, press

**shift**
then

**n**.

##
- Sum of Data

To obtain the sum of all the values entered into statistics memory, press

**shift**
then

**sum**.

##
- Sum of Squares
of Data

To obtain the sum of the squares of all the values entered into statistics
memory, press

**shift** then

**ssq**.

##
- Average of Data

To obtain the mean (arithmetic average) of all the values entered into
statistics memory, press

**shift** then

**avg**.

##
- Data Standard
Deviation

To obtain the standard deviation of all the values entered into statistics
memory, press

**shift** then

**sdv**.

##
- Data Sample
Standard Deviation

To obtain the sample standard deviation of all the values entered into
statistics memory, press

**shift** then

**ssd**.