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Statistical distributions library (in statu nascendi)

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/*
 * Copyright 2018 SPZ
 *
 * Licensed 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 math.stats.distribution.mle;

import math.Arithmetic;
import math.stats.ValidatedValue;
import math.stats.distribution.Normal;

/**
 * MLE for the parameters of the {@link Normal} distribution.
 */
public final class ParNormal implements ValidatedValue {
    /** mean (μ) */
    public double mean = Double.NaN;
    /** standard deviation (σ) */
    public double stdDev = Double.NaN;

    @Override
    public boolean isValid() {
        return !Arithmetic.isBadNum(mean) && stdDev > 0.0;
    }
}