# Calculate Mean, Median, and Mode Python 1. Mean– mean is usually the average of all the elements(number) divided by the count of elements.
2. Median– the median is the middle number among all the numbers divided by the count or frequency of the number. Like in 2, 3, 4, 5, 5, 6, 7, and 8, 5/2 will be the median.
3. Mode– the mode is the middle number among all the numbers. Like in 2, 3, 4, 5, 5, 6, 7, and 8, 5 will be the mode.

```#!/usr/bin/env python

def mean(arr, geometric= False):
if arr == []:
return None
if geometric:
prod = 1
for i in arr:
prod *= i
return round(prod**(1/len(arr)), 2)
else:
return sum(arr)/len(arr)

def median(arr):
if arr == []:
return None
arr.sort()
if len(arr)%2 != 0:
return arr[len(arr)//2]
else:
return (arr[len(arr)//2 - 1] + arr[len(arr)//2])/2

def mode(arr):
if arr == []:
return None
counts = {}
for i in set(arr):
count = arr.count(i)
counts[count] = i
return counts[max(counts.keys())]``` #### Author: Harry

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