Z-test

Calculates the z-Test of two data samples.

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For more information on Z-tests, refer to the corresponding Wikipedia article.

Data

Variable 1 range: The reference of the range of the first data series to analyze.

Variable 2 range: The reference of the range of the second data series to analyze.

Results to: The reference of the top left cell of the range where the test will be displayed.

Grouped By

Select whether the input data has columns or rows layout.

Example

The following table has two data sets.

 A B 28 19 26 13 31 12 23 5 20 34 27 31 28 31 14 12 4 24 0 23 2 19 8 10 9 33

Results for z-Test:

The following table shows the z-Test for the data series above:

 z-test Alpha 0.05 Hypothesized Mean Difference 0 Variable 1 Variable 2 Known Variance 0 0 Mean 16.9230769231 20.4615384615 Observations 13 13 Observed Mean Difference -3.5384615385 z #DIV/0! P (Z<=z) one-tail #DIV/0! z Critical one-tail 1.644853627 P (Z<=z) two-tail #DIV/0! z Critical two-tail 1.9599639845

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