Calculator: \(Z\)-testing

Summary

A calculator to provide \(p\)-values when a \(Z\)-test is being used.

Input parameters

Z-score:

Enter a Z-score between −8 and 8.

Test type:

Two-tailed One-tailed (upper) One-tailed (lower)

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This app demonstrates p-values in the standard normal distribution for use in Z-testing.

Graphical representation

Two-tailed test with z = 1.96

The blue shaded region represents the p-value for the selected test.

Result

Further reading

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

Version history

v1.0: initial version created 12/24 by Ellie Trace as part of a University of St Andrews VIP project.

• v1.1: updated to R Shiny interface by tdhc 04/25.

• v1.2: deprecated shinylive apps replaced 09/26 by tdhc.

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