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Formula Reference
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Formula Functions
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Compatibility Functions
- BETADIST
- BETAINV
- BINOMDIST
- CHIDIST
- CHIINV
- CHITEST
- CONFIDENCE
- COVAR
- CRITBINOM
- EXPONDIST
- FDIST
- FLOOR
- FTEST
- GAMMADIST
- GAMMAINV
- HYPGEOMDIST
- LOGINV
- LOGNORMDIST
- MODE
- NEGBINOMDIST
- NORM.INV
- NORMDIST
- NORMSDIST
- NORMSINV
- PERCENTILE
- PERCENTRANK
- POISSON
- QUARTILE
- RANK
- STDEV
- STDEVP
- TDIST
- TINV
- TTEST
- VAR
- VARP
- WEIBULL
-
ZTEST
- Database Functions
- Date and Time Functions
- Engineering Functions
- Financial Functions
- Information Functions
- Logical Functions
- Lookup and Reference Functions
- Math and Trigonometric Functions
- Statistical Functions
- Sparkline Functions
- Text Functions
- Web Functions
- Other Functions
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- Import and Export Reference
- Frequently Used Events
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ZTEST
This function returns the significance value of a z-test. The z-test generates a standard score for x with respect to the set of data and returns the two-tailed probability for the normal distribution.
Syntax
ZTEST( array, x, sigma )
Arguments
This function has these arguments:
Argument | Description |
|---|---|
array | Array of data to test |
x | Value at which to test |
sigma | [Optional] Known standard deviation for the population; if omitted, the calculation uses the sample standard deviation |
Remarks
If sigma is not specified, the calculated standard deviation of the data in the array is used.
The equation for calculating the z-test is as follows, where n is the number of data points.
Data Types
Accepts numeric data for all arguments. Returns numeric data.
Examples
ZTEST(A2:D12,40,0.877)
ZTEST(R2C1:R12C4,2)
ZTEST({5,10,15,12,11,8,16,7},10) gives the result 0.355512703503418
ZTEST({5,10,15,12,11,8,16,7},10,3) gives the result 0.318675944098237