# Mann Whitney U test

## Large sample

## Steps

_for example of data set:_

The following are the scores which random samples of students from 2 minority groups obtained on a current event test:

| Minority Group I  | 73 | 82 | 39 | 68 | 91 | 75 | 89 | 67 | 50 | 86 | 57 | 65 | 70 |
| ----------------- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Minority Group II | 51 | 42 | 36 | 53 | 88 | 59 | 49 | 66 | 25 | 64 | 18 | 76 | 74 |

Use the Mann-Whitney U test at the 0.05 level of significance to test whether the two groups differ significantly in their scores on the test.

* Goto variable view and add the variables
* Goto the data view and add the data
*   Click on **Analyze** tab > **NonParametric Tests** > **Legacy Dialogs** > **2 Independent Samples**.

    ![Step](https://1701689154-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FlhGYIl7VJdlGnlsVvVWa%2Fuploads%2Fgit-blob-cd1b2c7bf7afba2396e4bec219de8ab3d403d9c4%2Fstep.png?alt=media)
*   Add the required variable in **Test Variable List** and click **Options**.

    ![Dialog](https://1701689154-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FlhGYIl7VJdlGnlsVvVWa%2Fuploads%2Fgit-blob-1b31a82e2e1dfb6b10dbcd495fa2abdf183df68e%2Fdialog.png?alt=media)
*   Tick **Descriptives** and **Quartiles** and click **Continue**.

    ![Dialog](https://1701689154-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FlhGYIl7VJdlGnlsVvVWa%2Fuploads%2Fgit-blob-bb2c79c8b63a7fbe50fd9cf0ebb0848d5f527efa%2Fdialog_2.png?alt=media)
*   Required Output:

    ![Output](https://1701689154-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FlhGYIl7VJdlGnlsVvVWa%2Fuploads%2Fgit-blob-4bedf76a153179152c5740cb1235e39950c88147%2Foutput.png?alt=media)
