ZTEST function
Returns the one-tailed probability-value of a z-test. For a given hypothesized population mean, μ0, ZTEST returns the probability that the sample mean would be greater than the average of observations in the data set (array) — that is, the observed sample mean.
Syntax
ZTEST(array, x, [sigma])Square brackets indicate optional arguments.
Arguments
| Argument | Required | Meaning |
|---|---|---|
| array | Yes | Required. The array or range of data against which to test x.A2:A11 |
| x | Yes | Required. The value to test.4 |
| sigma | No | Optional. The population (known) standard deviation. If omitted, the sample standard deviation is used.10 |
Try ZTEST
Read the legacy ZTEST function name
=ZTEST(A2:A4,B2,C2)ZTEST is the compatibility name corresponding to Z.TEST. The sample mean equals the null mean 2, giving z=0 with the supplied positive population deviation. The right-tail p-value is 0.5. This is a one-sided test, not a two-sided confidence statement. Use the modern name when creating a new formula; the old spelling is useful when reading existing workbooks.
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ZTEST · top-level call
=ZTEST(A2:A4,B2,C2)Follow the cells behind a result
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Reference and compatibility
Univer 1.0.4 / Apache-2.0. Calculation checks cover the supplied examples only. The browser worksheet does not implement every Excel feature, external service or connected data type.