# TI-83 Instructions

## Computing z-Scores

### Find the *z*-scores of all members of a sample

- Find the mean of
`L`_{1}

.
- Find the standard deviation of
`L`_{1}

.
- Press
`2nd L`_{1}

.
- Press
`-`

(minus key).
- Enter the value of the mean from Step 1.
- Press
`STO`

.
- Press
`2nd L`_{2}

.
- Press
`ENTER`

. This stores the deviations from the mean in list
`L`_{2}

.
- Press
`2nd L`_{2}

.
- Type
`÷`

(divide).
- Enter the value of the standard deviation from Step 2.
- Press
`STO`

.
- Press
`2nd L`_{3}

.
- Press
`ENTER`

. This stores the *z*-scores in list
`L`_{3}

.
- To view the
*z*-scores, press `STAT`

. The `EDIT`

menu
title is highlighted and the `Edit...`

menu item is highlighted.
- Press
`ENTER`

. You can see the various lists.
- You can view the members of
`L`_{3}

by scrolling up and down
the list `L`_{3}

.