title: Incorrectly clustered instances in Weka
body: <p>I use <code>Weka tool</code> for data mining purpose of mine. When I feed the data set and cluster it using the <code>SimpleKMeans</code> algorithm it displays following statement.</p>
  
  <pre><code>Incorrectly clustered instances :   857.0    69.7883 %
  </code></pre>
  
  <p>Is it ok to proceed with that percentage ? If not please let me know how to reduce that percentage.</p>