001/*
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements.  See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License.  You may obtain a copy of the License at
008 *
009 *      http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017package org.apache.commons.math4.stat.inference;
018
019/**
020 * Represents an alternative hypothesis for a hypothesis test.
021 *
022 * @since 3.3
023 */
024public enum AlternativeHypothesis {
025
026    /**
027     * Represents a two-sided test. H0: p=p0, H1: p ≠ p0
028     */
029    TWO_SIDED,
030
031    /**
032     * Represents a right-sided test. H0: p ≤ p0, H1: p > p0.
033     */
034    GREATER_THAN,
035
036    /**
037     * Represents a left-sided test. H0: p ≥ p0, H1: p < p0.
038     */
039    LESS_THAN
040}