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67 lines
1.8 KiB
PHP
67 lines
1.8 KiB
PHP
<?php
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/**
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* Orange Management
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*
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* PHP Version 7.4
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*
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* @package tests
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* @copyright Dennis Eichhorn
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* @license OMS License 1.0
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* @version 1.0.0
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* @link https://orange-management.org
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*/
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declare(strict_types=1);
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namespace phpOMS\tests\Math\Stochastic\Distribution;
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use phpOMS\Math\Statistic\Average;
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use phpOMS\Math\Statistic\MeasureOfDispersion;
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use phpOMS\Math\Stochastic\Distribution\ZTesting;
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/**
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* @internal
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*/
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class ZTestingTest extends \PHPUnit\Framework\TestCase
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{
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// http://sphweb.bumc.bu.edu/otlt/MPH-Modules/BS/BS704_HypothesisTesting-ChiSquare/BS704_HypothesisTesting-ChiSquare_print.html
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/**
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* @covers phpOMS\Math\Stochastic\Distribution\ZTesting
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* @group framework
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*/
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public function testHypothesisFalse() : void
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{
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$a = 0.95;
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$observed = 0.512;
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$expected = 0.75;
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$total = 125; // total count of observed sample size
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self::assertFalse(ZTesting::testHypothesis($observed, $expected, $total, $a));
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}
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// https://support.microsoft.com/en-us/office/z-test-function-d633d5a3-2031-4614-a016-92180ad82bee?ui=en-us&rs=en-us&ad=us
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/**
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* @covers phpOMS\Math\Stochastic\Distribution\ZTesting
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* @group framework
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*/
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public function testZTest() : void
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{
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self::assertEqualsWithDelta(0.090574, ZTesting::zTest(4, [3, 6, 7, 8, 6, 5, 4, 2, 1, 9]), 0.001);
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}
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/**
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* @covers phpOMS\Math\Stochastic\Distribution\ZTesting
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* @group framework
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*/
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public function testZTestValues() : void
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{
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$data = [3, 6, 7, 8, 6, 5, 4, 2, 1, 9];
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$mean = Average::arithmeticMean($data);
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$size = \count($data);
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$sig = MeasureOfDispersion::standardDeviationSample($data);
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self::assertEqualsWithDelta(0.090574, ZTesting::zTestValues(4, $mean, $size, $sig), 0.001);
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}
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}
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