How To Find Mean, Median, And Mode In Python Using Statistics

In this tutorial, we will learn how to find the mean, median, and mode in Python using the built-in statistics module. These statistical measures are essential for performing descriptive analysis on numerical data and provide insights into the data’s central tendency and dispersion.

Step 1: Import the Statistics Module

First, we need to import the statistics module in our Python script. This module provides various statistical functions, such as mean, median, mode, and variance.

1
import statistics

Step 2: Prepare the Data Set

We will use a sample data set to demonstrate the usage of statistical functions in Python. Let’s create a list of numerical values for this purpose.

1
data = [10, 20, 30, 40, 50, 40, 30, 20, 10, 60]

Step 3: Calculate the Mean

The mean is the average value of the data set. To calculate the mean, we use the mean() function from the statistics module.

1
2
mean_val = statistics.mean(data)
print("Mean of the data set: ", mean_val)

Step 4: Calculate the Median

The median is the middle value of the data set when sorted in ascending or descending order. To calculate the median, we use the median() function from the statistics module.

1
2
median_val = statistics.median(data)
print("Median of the data set: ", median_val)

Step 5: Calculate the Mode

The mode is the most frequent value or value in the data set. To calculate the mode, we use the mode() function from the statistics module. If there is more than one mode in the data set, the function will return only the first mode it encounters.

1
2
mode_val = statistics.mode(data)
print("Mode of the data set: ", mode_val)

Full Code

1
2
3
4
5
6
7
8
9
10
11
12
import statistics
 
data = [10, 20, 30, 40, 50, 40, 30, 20, 10, 60]
 
mean_val = statistics.mean(data)
print("Mean of the data set: ", mean_val)
 
median_val = statistics.median(data)
print("Median of the data set: ", median_val)
 
mode_val = statistics.mode(data)
print("Mode of the data set: ", mode_val)

Output

Mean of the data set:  32
Median of the data set:  30
Mode of the data set:  10

Conclusion

In this tutorial, we learned how to find the mean, median, and mode in Python using the built-in statistics module. This module helps us perform various descriptive statistical analysis on numerical data, which is essential for understanding and interpreting the data effectively.