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Add an algorithm for calculating the z-score or standard score for sample statistics #3065

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Merged
merged 21 commits into from
May 29, 2022
Merged

Add an algorithm for calculating the z-score or standard score for sample statistics #3065

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86b0c49
StandardDeviation.java
RaghavTaneja Apr 29, 2022
72e61e3
Merge pull request #1 from RaghavTaneja/RaghavTaneja-patch-2
RaghavTaneja Apr 29, 2022
d50869d
StandardDeviationTest.java
RaghavTaneja Apr 29, 2022
f4efb53
Merge pull request #2 from RaghavTaneja/RaghavTaneja-patch-3
RaghavTaneja Apr 29, 2022
78de356
Fixed small naming error
RaghavTaneja Apr 29, 2022
0324e6d
^
RaghavTaneja Apr 29, 2022
757b902
Fixed test case 4
RaghavTaneja Apr 29, 2022
6ee9c62
Merge branch 'TheAlgorithms:master' into master
RaghavTaneja May 10, 2022
e79c361
Create DistanceFormula.java
RaghavTaneja May 10, 2022
b4e896c
Merge pull request #3 from RaghavTaneja/RaghavTaneja-patch-4
RaghavTaneja May 10, 2022
930cdc4
Update DistanceFormula.java
RaghavTaneja May 10, 2022
503593c
Merge pull request #4 from RaghavTaneja/RaghavTaneja-patch-5
RaghavTaneja May 10, 2022
dc6b93e
Add tests for Distance Formula
RaghavTaneja May 10, 2022
2612be4
Merge pull request #5 from RaghavTaneja/RaghavTaneja-patch-5-1
RaghavTaneja May 10, 2022
ab1cc3d
Merge branch 'TheAlgorithms:master' into master
RaghavTaneja May 24, 2022
6d43e83
Create StandardScore.java
RaghavTaneja May 24, 2022
0031df7
Update StandardScore.java
RaghavTaneja May 24, 2022
4d397ea
Create StandardScoreTest.java
RaghavTaneja May 24, 2022
dfce83b
Removed extra curly brace
RaghavTaneja May 24, 2022
9e8f374
Merge branch 'master' into RaghavTaneja-patch-6
siriak May 29, 2022
8d062e9
Update src/main/java/com/thealgorithms/maths/StandardScore.java
siriak May 29, 2022
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9 changes: 9 additions & 0 deletions src/main/java/com/thealgorithms/maths/StandardScore.java
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Original file line number Diff line number Diff line change
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package com.thealgorithms.maths;

public class StandardScore {
public static double zScore(double num, double mean, double stdDev)
{
double z = (num - mean)/stdDev;
return z;
}
}
27 changes: 27 additions & 0 deletions src/test/java/com/thealgorithms/maths/StandardScoreTest.java
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package com.thealgorithms.maths;

import org.junit.jupiter.api.Assertions;
import org.junit.jupiter.api.Test;

public class StandardScoreTest{
@Test
void test1()
{
Assertions.assertEquals(StandardScore.zScore(2, 0, 5), 0.4);
}
@Test
void test2()
{
Assertions.assertEquals(StandardScore.zScore(1, 1, 1), 0.0);
}
@Test
void test3()
{
Assertions.assertEquals(StandardScore.zScore(2.5, 1.8, 0.7), 1.0);
}
@Test
void test4()
{
Assertions.assertEquals(StandardScore.zScore(8.9, 3, 4.2), 1.4047619047619049);
}
}