How to Find the Z Score on a TI-83

The Z score is frequently used in statistical analysis.
••• Ryan McVay/Photodisc/Getty Images

Z score is a representation in statistics of the amount of standard deviations data that is above or below the average. Calculating the z score by hand can be time-consuming and complicated, but it can be easily found using a sophisticated calculator like the TI-83. The TI-83 is a calculator equipped to perform many functions, including one named invNorm (p) that computes a z score value when cumulative probabilities are given.

    Press the "2nd" button and then press the "VARS" button. Using the down arrow, scroll to 3:invNormal( and press "enter."

    Input your known probability in decimal form and add a parenthesis. For example, if your probability is 80, then input .8. On the screen it would look like: invNorm(.8)

    Press "enter." This will give you the z score to four decimal places.

Related Articles

How to Calculate a P-Value
How to Solve for Sigma on a TI83
How to Calculate CV Values
How to Find a Z Score
How to Calculate a Sigma Value
How to Know if Something Is Significant Using SPSS
How to Calculate the Mean in a Probability Distribution
How to Calculate Statistical Mean
How to Calculate the Confidence Interval of the Mean
How Do I Calculate the Relative Standard Deviation...
How to Solve a Parabola
How to Calculate an AFQT Score
How to Calculate the T Test Value
How to Interpret a Student's T-Test Results
How to Calculate Discrete Probability Distribution
How to Find Correlation Coefficient & Coefficient of...
How to Calculate Binomial Probability
How to Make a Relative Frequency Table
How to Calculate Percent Relative Range

Dont Go!

We Have More Great Sciencing Articles!