ZTEST(array, x [,sigma])
Returns the two-tailed p-value of a z-test.
|array||The array or range of data against which to test x.|
|x||The value to test.|
|sigma||(Optional) The population (known) standard deviation.|
|* Z.TEST was added in Excel 2010 to replace this function.|
* If array is empty, then #N/A is returned.
* The z-test generates a standard score for x with respect to the data set, array, and returns the two-tailed probability for the normal distribution. You can use this function to assess the likelihood that a particular observation is drawn from a particular population.
* For the Microsoft documentation refer to support.office.com
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