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A statistical examination of two population means. A two sample z-test examines whether two samples are different and is commonly used when two normal distributions have known variances and when an experiment uses a large sample size.
The z-test statistical test functions are grouped according the type of input data series that applies to the function.
If the function is used in the data load script, the values are iterated over a number of records as defined by a group by clause.
If the function is used in a chart expression, the values are iterated over the chart dimensions.
Use the drop-down on each function to see a brief description and the syntax of each function. Click the function name in the syntax description for further details.
One column format functions
The following functions apply to z-tests with simple input data series.
ZTest_conf() returns the aggregated z value for a series of values.
