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## weka.classifiers.trees.j48
Class Stats

    java.lang.Object
      weka.classifiers.trees.j48.Stats

    public class Stats

extends java.lang.Object

Class implementing a statistical routine needed by J48 to compute its error estimate.

Version:
  $Revision: 1.7 $
Author:
  Eibe Frank (eibe@cs.waikato.ac.nz)

Constructor Summary
`Stats()`

Method Summary
`static double` | `addErrs(double N, double e, float CF)` Computes estimated extra error for given total number of instances and error using normal approximation to binomial distribution (and continuity correction).

Methods inherited from class java.lang.Object
`equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

### Stats

    public Stats()

Method Detail

### addErrs

    public static double addErrs(double N,
                                 double e,
                                 float CF)

  Computes estimated extra error for given total number of instances and error using normal approximation to binomial distribution (and continuity correction).

  Parameters:
    `N` - number of instances
    `e` - observed error
    `CF` - confidence value

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