# 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**.