commons-statistics-inference/src/main/java/org/apache/commons/statistics/inference/DataDispersion.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.commons.statistics.inference;

/**
 * Represents an assumption on the dispersion of data.
 *
 * @see <a href="https://en.wikipedia.org/wiki/Homoscedasticity_and_heteroscedasticity">
 * Homoscedasticity and heteroscedasticity (Wikipedia)</a>
 * @since 1.1
 */
public enum DataDispersion {
    /**
     * All data has the same finite variance (homogeneity of variance).
     */
    HOMOSCEDASTIC,

    /**
     * Data does not have the same variance.
     */
    HETEROSCEDASTIC
}