# Statistics Module

Python statistics module provides the functions to mathematical statistics of numeric data. There are some popular statistical functions defined in this module.

## mean() function

The mean() function is used to calculate the arithmetic mean of the numbers in the list.

Example
snippet
```import statistics
# list of positive integer numbers
datasets = [5, 2, 7, 4, 2, 6, 8]
x = statistics.mean(datasets)
# Printing the mean
print("Mean is :", x)```
Output
Mean is : 4.857142857142857

## median() function

The median() function is used to return the middle value of the numeric data in the list.

Example
snippet
```import statistics
datasets = [4, -5, 6, 6, 9, 4, 5, -2]
# Printing median of the
# random data-set
print("Median of data-set is : % s "
% (statistics.median(datasets)))```
Output
Median of data-set is : 4.5

## mode() function

The mode() function returns the most common data that occurs in the list.

Example
snippet
```import statistics
# declaring a simple data-set consisting of real valued positive integers.
dataset =[2, 4, 7, 7, 2, 2, 3, 6, 6, 8]
# Printing out the mode of given data-set
print("Calculated Mode % s" % (statistics.mode(dataset)))```
Output
Calculated Mode 2

## stdev() function

The stdev() function is used to calculate the standard deviation on a given sample which is available in the form of the list.

Example
snippet
```import statistics
# creating a simple data - set
sample = [7, 8, 9, 10, 11]
# Prints standard deviation
print("Standard Deviation of sample is % s "
% (statistics.stdev(sample)))```
Output
Standard Deviation of sample is 1.5811388300841898

## median_low()

The median_low function is used to return the low median of numeric data in the list.

Example
snippet
```import statistics
# simple list of a set of integers
set1 = [4, 6, 2, 5, 7, 7]
# Note: low median will always be a member of the data-set.
# Print low median of the data-set
print("Low median of data-set is % s "
% (statistics.median_low(set1)))```
Output
Low median of the data-set is 5

## median_high()

The median_high function is used to return the high median of numeric data in the list.

Example
snippet
```import statistics
# list of set of the integers
dataset = [2, 1, 7, 6, 1, 9]
print("High median of data-set is %s "
% (statistics.median_high(dataset)))```
Output
High median of the data-set is 6
Related Tutorial
1 Pass
5 Set
10 Regex
16 Assert
25 IDEs
26 Arrays