01: /*
02: * Copyright 2004 The Apache Software Foundation.
03: *
04: * Licensed under the Apache License, Version 2.0 (the "License");
05: * you may not use this file except in compliance with the License.
06: * You may obtain a copy of the License at
07: *
08: * http://www.apache.org/licenses/LICENSE-2.0
09: *
10: * Unless required by applicable law or agreed to in writing, software
11: * distributed under the License is distributed on an "AS IS" BASIS,
12: * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13: * See the License for the specific language governing permissions and
14: * limitations under the License.
15: */
16:
17: package org.apache.commons.math.distribution;
18:
19: /**
20: * Normal (Gauss) Distribution.
21: * Instances of NormalDistribution objects should be created using
22: * {@link DistributionFactory#createNormalDistribution(double, double)}.<p>
23: *
24: * <p>
25: * References:<p>
26: * <ul>
27: * <li><a href="http://mathworld.wolfram.com/NormalDistribution.html">
28: * Normal Distribution</a></li>
29: * </ul>
30: * </p>
31: *
32: * @version $Revision: 201915 $ $Date: 2005-06-26 15:20:57 -0700 (Sun, 26 Jun 2005) $
33: */
34: public interface NormalDistribution extends ContinuousDistribution {
35: /**
36: * Access the mean.
37: * @return mean for this distribution
38: */
39: double getMean();
40:
41: /**
42: * Modify the mean.
43: * @param mean for this distribution
44: */
45: void setMean(double mean);
46:
47: /**
48: * Access the standard deviation.
49: * @return standard deviation for this distribution
50: */
51: double getStandardDeviation();
52:
53: /**
54: * Modify the standard deviation.
55: * @param sd standard deviation for this distribution
56: */
57: void setStandardDeviation(double sd);
58: }
|