# Python - How To Calculate the Arithmetic Mean in Python

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The term arithmetic mean is the average of the numbers. The mathematical formula to determine the Arithmetic Mean is to divide the sum of the numbers by the count. It is determined in Python in the following ways.

• Use the mathematical formula.
• Use the mean() function from Python’s standard libraries like `NumPy`, `statistics`, `scipy`.

## Use the Mathematical Formula to Calculate the Arithmetic Mean in Python

Follow this program to use the mathematical formula.

``listnumbers=[1,2,4]; print("The mean is =",sum(listnumbers) / len(listnumbers)); ``

Output:

``The mean is = 2.3333333333333335 ``

## Use the `numpy.mean()` Function to Calculate the Arithmetic Mean in Python

The `NumPy` standard library contains used to determine the Arithmetic Mean in Python. For this, import the `NumPy` library first. See the example below.

``import numpy listnumbers = [1, 2, 4] print ("The mean is =",numpy.mean(listnumbers)) ``

Output:

``The mean is = 2.3333333333333335 ``

## Use the `statistics.mean()` Function to Calculate the Arithmetic Mean in Python

The `statistics` library contains the `mean()` function used to determine the Arithmetic Mean. For this, import the `statistics` library first. Follow the example below.

``import statistics listnumbers = [1, 2, 4] print("The mean is =",statistics.mean(listnumbers)) ``

Output:

``The mean is = 2.3333333333333335 ``

## Use the `scipy.mean()` Function to Calculate the Arithmetic Mean in Python

The `scipy` library contains the `mean()` function used to determine the mean. For this, import the `scipy` library first. Here’s an example.

``import scipy; listnumbers=[1,2,4]; print("The mean is =",scipy.mean(listnumbers)); ``

Output:

``The mean is = 2.3333333333333335 ``