Free online math practice
Z-score Practice
Recall the standardized value of an observation.
Start practicingZ-score
- Free to practice.
- No account required.
- Progress stays on this device.
What you’ll practice
Subtract the mean, then divide by the nonzero standard deviation. The sign indicates which side of the mean the observation occupies.
Where this helps
Measuring distance from the mean in standard deviations.
Before you start
Use this topic to practice math you have already learned. The examples show the available kinds of recall tasks; this is not a complete textbook chapter. Check the answer form and any stated conditions.
Try a few examples
Real practice. Real progress.
Example 1 of 1
x and mu use the same units and sigma is a strictly positive standard deviation in those units.
Choose the exact expression.
Grades and courses that include this topic
Related practice
Start practicingZ-score
- Free to practice.
- No account required.
- Progress stays on this device.