home | career | drupal | java | mac | mysql | perl | scala | uml | unix  

Java example source code file (ConfidenceInterval.java)

This example Java source code file (ConfidenceInterval.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

confidenceinterval, override, string

The ConfidenceInterval.java Java example source code

/*
 * 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.math3.stat.interval;

import org.apache.commons.math3.exception.MathIllegalArgumentException;
import org.apache.commons.math3.exception.util.LocalizedFormats;

/**
 * Represents an interval estimate of a population parameter.
 *
 * @since 3.3
 */
public class ConfidenceInterval {

    /** Lower endpoint of the interval */
    private double lowerBound;

    /** Upper endpoint of the interval */
    private double upperBound;

    /**
     * The asserted probability that the interval contains the population
     * parameter
     */
    private double confidenceLevel;

    /**
     * Create a confidence interval with the given bounds and confidence level.
     * <p>
     * Preconditions:
     * <ul>
     * <li>{@code lower} must be strictly less than {@code upper}
     * <li>{@code confidenceLevel} must be strictly between 0 and 1 (exclusive)
     * </ul>
     * </p>
     *
     * @param lowerBound lower endpoint of the interval
     * @param upperBound upper endpoint of the interval
     * @param confidenceLevel coverage probability
     * @throws MathIllegalArgumentException if the preconditions are not met
     */
    public ConfidenceInterval(double lowerBound, double upperBound, double confidenceLevel) {
        checkParameters(lowerBound, upperBound, confidenceLevel);
        this.lowerBound = lowerBound;
        this.upperBound = upperBound;
        this.confidenceLevel = confidenceLevel;
    }

    /**
     * @return the lower endpoint of the interval
     */
    public double getLowerBound() {
        return lowerBound;
    }

    /**
     * @return the upper endpoint of the interval
     */
    public double getUpperBound() {
        return upperBound;
    }

    /**
     * @return the asserted probability that the interval contains the
     *         population parameter
     */
    public double getConfidenceLevel() {
        return confidenceLevel;
    }

    /**
     * @return String representation of the confidence interval
     */
    @Override
    public String toString() {
        return "[" + lowerBound + ";" + upperBound + "] (confidence level:" + confidenceLevel + ")";
    }

    /**
     * Verifies that (lower, upper) is a valid non-empty interval and confidence
     * is strictly between 0 and 1.
     *
     * @param lower lower endpoint
     * @param upper upper endpoint
     * @param confidence confidence level
     */
    private void checkParameters(double lower, double upper, double confidence) {
        if (lower >= upper) {
            throw new MathIllegalArgumentException(LocalizedFormats.LOWER_BOUND_NOT_BELOW_UPPER_BOUND, lower, upper);
        }
        if (confidence <= 0 || confidence >= 1) {
            throw new MathIllegalArgumentException(LocalizedFormats.OUT_OF_BOUNDS_CONFIDENCE_LEVEL, confidence, 0, 1);
        }
    }
}

Other Java examples (source code examples)

Here is a short list of links related to this Java ConfidenceInterval.java source code file:



my book on functional programming

 

new blog posts

 

Copyright 1998-2019 Alvin Alexander, alvinalexander.com
All Rights Reserved.

A percentage of advertising revenue from
pages under the /java/jwarehouse URI on this website is
paid back to open source projects.