# Paired t-test

Calculates the paired t-Test of two data samples.

Per a accedir a aquesta ordre...

#### Des de la barra de menús:

Choose Data - Statistics - Paired t-test

#### Des de la interfície en pestanyes:

Choose Data - Statistics - Paired t-test.

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

A paired t-test is any statistical hypothesis test that follows a Student's t distribution.

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

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.

#### Agrupat per

Select whether the input data has columns or rows layout.

### Obre un fitxer amb un exemple:

#### Exemple

La taula següent conté dos conjunts de dades.

 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 paired t-test:

The following table shows the paired t-test for the data series above:

 paired t-test Alfa 0.05 Hypothesized Mean Difference 0 Variable 1 Variable 2 Mean 16.9230769231 20.4615384615 Variance 125.0769230769 94.4358974359 Observacions 13 13 Correlació de Pearson -0.0617539772 Observed Mean Difference -3.5384615385 Variance of the Differences 232.9358974359 df 12 t Stat -0.8359262137 P (T<=t) one-tail 0.2097651442 t Critical one-tail 1.7822875556 P (T<=t) two-tail 0.4195302884 t Critical two-tail 2.1788128297

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