From ad218b4fe88fa02e4c82db4e68828e043411775b Mon Sep 17 00:00:00 2001
From: michaelik <mikeikechi3@gmail.com>
Date: Fri, 18 Feb 2022 13:19:27 +0100
Subject: [PATCH 1/2] Refector code and implement modal average

---
 src/Average.php       | 14 ++++++++++++--
 tests/AverageTest.php | 14 +++++++++++++-
 2 files changed, 25 insertions(+), 3 deletions(-)

diff --git a/src/Average.php b/src/Average.php
index 17b5229..670c393 100644
--- a/src/Average.php
+++ b/src/Average.php
@@ -9,7 +9,7 @@ class Average
      * @param array $numbers Array of numbers
      * @return float Mean average
      */
-    public function mean(array $numbers)
+    public function mean(array $numbers): float
     {
         return array_sum($numbers) / count($numbers);
     }
@@ -19,7 +19,7 @@ public function mean(array $numbers)
      * @param array $numbers Array of numbers
      * @return float Median average
      */
-    public function median(array $numbers)
+    public function median(array $numbers): float
     {
         sort($numbers);
         $size = count($numbers);
@@ -31,4 +31,14 @@ public function median(array $numbers)
             );
         }
     }
+    /**
+     * Calculate the median average
+     * @param array $numbers Array of numbers
+     * @return float Median average
+     */
+    public function mode(array $numbers): int
+    {
+        $values = array_count_values($numbers);
+        return array_search(max($values), $values);
+    }
 }
diff --git a/tests/AverageTest.php b/tests/AverageTest.php
index 044bcc5..b877832 100644
--- a/tests/AverageTest.php
+++ b/tests/AverageTest.php
@@ -18,9 +18,21 @@ public function testCalculationOfMean()
         $this->assertEquals(4.4, $this->Average->mean($numbers));
     }
 
-    public function testCalculationOfMedian()
+    public function testCalculationOfMedianForOddNumberOfValues()
     {
         $numbers = [3, 7, 6, 1, 5];
         $this->assertEquals(5, $this->Average->median($numbers));
     }
+
+    public function testCalculationOfMedianForEvenNumberOfValues()
+    {
+        $numbers = [3, 7, 6, 5];
+        $this->assertEquals(5.5, $this->Average->median($numbers));
+    }
+
+    public function testCalculationOfMode()
+    {
+        $numbers = [1, 3, 3, 3, 4, 4, 6, 6, 9];
+        $this->assertEquals(3, $this->Average->mode($numbers));
+    }
 }

From 0813c80513ec855a862c3946e9e50d6e83374bfe Mon Sep 17 00:00:00 2001
From: michaelik <mikeikechi3@gmail.com>
Date: Fri, 18 Feb 2022 13:34:10 +0100
Subject: [PATCH 2/2] Clean median method

---
 src/Average.php | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/src/Average.php b/src/Average.php
index 670c393..6724d8e 100644
--- a/src/Average.php
+++ b/src/Average.php
@@ -25,11 +25,10 @@ public function median(array $numbers): float
         $size = count($numbers);
         if ($size % 2) {
             return $numbers[$size / 2];
-        } else {
-            return $this->mean(
+        }
+        return $this->mean(
                 array_slice($numbers, ($size / 2) - 1, 2)
             );
-        }
     }
     /**
      * Calculate the median average