title: ImportError: No module named statsmodels.api
body: <p>I'm new in python and have this problem. I have install Pandas, Numpy, Scipy, and I install Stats Models with apt-get install python-statsmodels, but when I try to use:</p>
  
  <pre><code>import statsmodels.api as sm
  </code></pre>
  
  <p>But I have this problem:</p>
  
  <pre><code>ImportError                               Traceback (most recent call last)
  &lt;ipython-input-1-6030a6549dc0&gt; in &lt;module&gt;()
  ----&gt; 1 import statsmodels.api as sm
  
  ImportError: No module named statsmodels.api
  </code></pre>
  
  <p>Why??</p>