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16 package org.apache.commons.math.distribution;
17
18 /**
19 * Student's t-Distribution.
20 *
21 * Instances of TDistribution objects should be created using
22 * {@link DistributionFactory#createTDistribution(double)}
23 *
24 * <p>
25 * References:
26 * <ul>
27 * <li><a href="http://mathworld.wolfram.com/Studentst-Distribution.html">
28 * Student's t-Distribution</a></li>
29 * </ul>
30 * </p>
31 *
32 * @version $Revision: 155427 $ $Date: 2005-02-26 06:11:52 -0700 (Sat, 26 Feb 2005) $
33 */
34 public interface TDistribution extends ContinuousDistribution {
35 /**
36 * Modify the degrees of freedom.
37 * @param degreesOfFreedom the new degrees of freedom.
38 */
39 void setDegreesOfFreedom(double degreesOfFreedom);
40
41 /**
42 * Access the degrees of freedom.
43 * @return the degrees of freedom.
44 */
45 double getDegreesOfFreedom();
46 }