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Day twenty two: 30 August 2013
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Introduction
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* The t and z distributions
* A brief revision on the t test

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Background reading
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* `t and z distributions, raw
  <https://raw.github.com/practical-neuroimaging/pna-notebooks/master/t_and_z_distribution.ipynb>`_
  notebook file for downloading.
* `t and z distributions, web
  <http://nbviewer.ipython.org/urls/raw.github.com/practical-neuroimaging/pna-notebooks/master/t_and_z_distribution.ipynb>`_
  notebook presented nicely as a web page.
* `back to basics, raw
  <https://raw.github.com/practical-neuroimaging/pna-notebooks/master/principles_statistics.ipynb>`_
  notebook file for downloading.
* `back to basics, web
  <http://nbviewer.ipython.org/urls/raw.github.com/practical-neuroimaging/pna-notebooks/master/principles_statistics.ipynb>`_
  notebook presented nicely as a web page.

Notebook with small solution
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* `simple model, extended, raw
  <https://raw.github.com/practical-neuroimaging/pna-notebooks/master/finding_faces.ipynb>`_
  notebook file for downloading.
* `simple model, extended, web
  <http://nbviewer.ipython.org/urls/raw.github.com/practical-neuroimaging/pna-notebooks/master/finding_faces.ipynb>`_
  notebook presented nicely as a web page.