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 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
Version Available
This function is available in product version 1.0 or later.
See Also
FTEST | TTEST | Statistical Functions