Calculator: \(Z\)-scores

Summary

A calculator to provide \(Z\)-scores for a given significance level \(\alpha\).

Input parameters

Significance level (α):

Enter a value from 0.001 to 0.999.

Test type:

One-tailed Two-tailed

Z-score results

Critical Z-score

±1.9600

For a two-tailed test with α = 0.05, the critical values are −1.9600 and 1.9600.

Further reading

This interactive element appears in Guide: Introduction to confidence intervals. Please click this link to go to the guide.

Version history

v1.0: initial version created 10/25 by tdhc and Millie Harris as part of a University of St Andrews VIP project.

This work is licensed under CC BY-NC-SA 4.0.