Contents

# Z-test

Calculates the z-Test of two data samples.

To access this command...

#### From the menu bar:

Choose Data - Statistics - Z-test

#### From the tabbed interface:

Choose Data - Statistics - Z-test.

On the Data menu of the Data tab, choose Statistics - Z-test.

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
--- | --- | ---
1 | 28 | 19
2 | 26 | 13
3 | 31 | 12
4 | 23 | 5
5 | 20 | 34
6 | 27 | 31
7 | 28 | 31
8 | 14 | 12
9 | 4 | 24
10 | 0 | 23
11 | 2 | 19
12 | 8 | 10
13 | 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 |

Related Topics

Sampling

Descriptive Statistics

Analysis of Variance (ANOVA)

Correlation

Covariance

Exponential Smoothing

Moving Average

Regression Analysis

Paired t-test

F-test

Z-test

Chi-square test

Fourier Analysis

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