1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one or more
3 * contributor license agreements. See the NOTICE file distributed with
4 * this work for additional information regarding copyright ownership.
5 * The ASF licenses this file to You under the Apache License, Version 2.0
6 * (the "License"); you may not use this file except in compliance with
7 * the License. You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17
18 package org.apache.commons.math.distribution;
19
20 /**
21 * Normal (Gauss) Distribution.
22 *
23 * <p>
24 * References:</p><p>
25 * <ul>
26 * <li><a href="http://mathworld.wolfram.com/NormalDistribution.html">
27 * Normal Distribution</a></li>
28 * </ul>
29 * </p>
30 *
31 * @version $Revision: 617953 $ $Date: 2008-02-02 22:54:00 -0700 (Sat, 02 Feb 2008) $
32 */
33 public interface NormalDistribution extends ContinuousDistribution {
34 /**
35 * Access the mean.
36 * @return mean for this distribution
37 */
38 double getMean();
39 /**
40 * Modify the mean.
41 * @param mean for this distribution
42 */
43 void setMean(double mean);
44 /**
45 * Access the standard deviation.
46 * @return standard deviation for this distribution
47 */
48 double getStandardDeviation();
49 /**
50 * Modify the standard deviation.
51 * @param sd standard deviation for this distribution
52 */
53 void setStandardDeviation(double sd);
54 }