

Java example source code file (NormalApproximationInterval.java)
The NormalApproximationInterval.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/LICENSE2.0 * * 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.distribution.NormalDistribution; import org.apache.commons.math3.util.FastMath; /** * Implements the normal approximation method for creating a binomial proportion confidence interval. * * @see <a * href="http://en.wikipedia.org/wiki/Binomial_proportion_confidence_interval#Normal_approximation_interval"> * Normal approximation interval (Wikipedia)</a> * @since 3.3 */ public class NormalApproximationInterval implements BinomialConfidenceInterval { /** {@inheritDoc} */ public ConfidenceInterval createInterval(int numberOfTrials, int numberOfSuccesses, double confidenceLevel) { IntervalUtils.checkParameters(numberOfTrials, numberOfSuccesses, confidenceLevel); final double mean = (double) numberOfSuccesses / (double) numberOfTrials; final double alpha = (1.0  confidenceLevel) / 2; final NormalDistribution normalDistribution = new NormalDistribution(); final double difference = normalDistribution.inverseCumulativeProbability(1  alpha) * FastMath.sqrt(1.0 / numberOfTrials * mean * (1  mean)); return new ConfidenceInterval(mean  difference, mean + difference, confidenceLevel); } } Other Java examples (source code examples)Here is a short list of links related to this Java NormalApproximationInterval.java source code file: 
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