# Statistics

To access the statistical functions, select Statistics from the Mode menu, or Alt-Shift-S on the keyboard, or use the shift and Stat buttons. In statistics mode, some of the function keypad buttons display statistics functions:

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.

To clear the statistics memory, press shift and then press SAC (Statistics All Clear) button (the shifted version of the AC button).

## Data 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.

## SAC Statistics All Clear

To clear the statistics memory, press the shift button, followed by SAC (i.e. shifted AC).

## nPr Permutations

Computes the number of permutations nPr.

Example: Compute the number of ways of arranging five objects chosen from a population of ten:

1 0 shift nPr 5 =

Result: 30240

## nCr Combinations

Computes the number of combinations nCr.

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

1 0 shift nCr 5 =

Result: 252

## max Maximum of data values

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

## min Minimum of data values

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

## n Number of Data Points

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

## sum Sum of Data

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

## ssq Sum of Squares of Data

To obtain the sum of the squares of all the values entered into statistics memory, press shift then ssq.

## avg Arithmetic Mean of Data (Average)

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

## avg Geometric Mean of Data

To obtain the geometric mean of all the values entered into statistics memory, press shift then Gm.

## sdv Data Standard Deviation

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

## ssd Data Sample Standard Deviation

To obtain the sample standard deviation of all the values entered into statistics memory, press shift then ssd.