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# Z-test

Calculates the z-Test of two data samples.

Para aceder a este comando...

#### 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.

## dados

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.

#### Agrupar por

Selecione se os dados de entrada estão dispostos em colunas ou linhas.

#### Exemplo

A tabela seguinte tem dois conjuntos de dados.

| 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:

Teste z |  |
Alfa | 0.05 |
Diferença média hipotética | 0 |
| Variável 1 | Variável 2
Variância conhecida | 0 | 0
Média | 16.9230769231 | 20.4615384615
Observações | 13 | 13
Diferença média observada | -3.5384615385 |
z | #DIV/0! |
P (Z<=z) unicaudal | #DIV/0! |
z crítico unicaudal | 1.644853627 |
P (Z<=z) bicaudal | #DIV/0! |
z crítico bicaudal | 1.9599639845 |

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