Python statistics.mean() Method with Examples

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statistics.mean() Method in Python:

The statistics. mean() method computes the mean (average) of a data set given.

mean: To calculate the mean, add all of the given values and divide by the number of values.

for example

let list = [5, 10, 15, 20]

mean= 5+10+15+20/4 = 12.5

Syntax:

statistics.mean(data)

Parameters

data: This is Required. It is the data values that will be used (it can be any sequence, list, or iterator).

Note: It is to be noted that if the data is empty, it returns a StatisticsError.

Return Value:

Returns a float value that represents the mean of the given data.

Examples:

Example1:

Input:

Given list = [10, 20, 40, 15, 30]

Output:

The mean of the given list items [10, 20, 40, 15, 30]  =  23

Example2:

Input:

Given list = [-1, -2, 6, 7, 4, 9]

Output:

The mean of the given list items [-1, -2, 6, 7, 4, 9] = 3.8333333333333335

statistics.mean() Method with Examples in Python

Method #1: Using Built-in Functions (Static Input)

Approach:

  • Import statistics module using the import keyword.
  • Give the list as static input and store it in a variable.
  • Pass the given list as an argument to the statistics.mean() method that computes the mean (average) of the given list items.
  • Store it in another variable.
  • Print the mean (average) of the given list items.
  • The Exit of the Program.

Below is the implementation:

# Import statistics module using the import keyword.
import statistics
# Give the list as static input and store it in a variable.
gvn_lst = [10, 20, 40, 15, 30]
# Pass the given list as an argument to the statistics.mean() method that
# computes the mean (average) of the given list items.
# Store it in another variable.
rslt = statistics.mean(gvn_lst)
# Print the mean (average) of the given list items.
print("The mean of the given list items", gvn_lst, " = ", rslt)

Output:

The mean of the given list items [10, 20, 40, 15, 30]  =  23

Method #2: Using Built-in Functions (User Input)

Approach:

  • Import statistics module using the import keyword.
  • Give the list as user input using list(),map(),input(),and split() functions.
  • Store it in another variable.
  • Pass the given list as an argument to the statistics.mean() method that computes the mean (average) of the given list items.
  • Store it in another variable.
  • Print the mean (average) of the given list items.
  • The Exit of the Program.

Below is the implementation:

# Import statistics module using the import keyword.
import statistics
# Give the list as user input using list(),map(),input(),and split() functions.
# Store it in a variable.
gvn_lst = list(map(int, input(
    'Enter some random List Elements separated by spaces = ').split()))
# Pass the given list as an argument to the statistics.mean() method that
# computes the mean (average) of the given list items.
# Store it in another variable.
rslt = statistics.mean(gvn_lst)
# Print the mean (average) of the given list items.
print("The mean of the given list items", gvn_lst, " = ", rslt)

Output:

Enter some random List Elements separated by spaces = -1 -2 6 7 4 9
The mean of the given list items [-1, -2, 6, 7, 4, 9] = 3.8333333333333335