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Z.TEST Function in Excel: Syntax, Examples and Free Practice

By Rinkesh Shah, founder of Cellgrids.

Z.TEST is an Excel Statistical function. Returns the one-tailed probability of a z-test.

Z.TEST syntax

=Z.TEST(array, x, [sigma])

Arguments

When to use Z.TEST

Z.TEST is used in data analysis work to summarize or test patterns across a data set.

Practice Z.TEST online, free

Open the live Excel-style spreadsheet and try Z.TEST yourself. No Excel install or sign-up needed to start.

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More Statistical functions

Frequently asked questions

What does the Z.TEST function do in Excel?

Returns the one-tailed probability of a z-test.

What is the syntax of Z.TEST in Excel?

The syntax is =Z.TEST(array, x, [sigma]). array: The range or array to evaluate; x: The value to evaluate; sigma: The known population standard deviation (optional).

Where can I practice Z.TEST online for free?

Open the free live spreadsheet on Cellgrids and try Z.TEST yourself. No Excel install is needed and you can start without signing up.

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