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What is the statistics median_grouped() method in Python?

Onyejiaku Theophilus Chidalu

Grokking Modern System Design Interview for Engineers & Managers

Ace your System Design Interview and take your career to the next level. Learn to handle the design of applications like Netflix, Quora, Facebook, Uber, and many more in a 45-min interview. Learn the RESHADED framework for architecting web-scale applications by determining requirements, constraints, and assumptions before diving into a step-by-step design process.

Overview

Python’s statistics.median_grouped() method computes the median of grouped continuous data.

Mathematically, the formula used to calculate the median of grouped continuous data is:

Median=L +(n/2)BG ×W\large \mathbf{Median = L \ + \frac{(n/2) - B}{G} \ \times W}

In this formula:

  • L represents the lower limit of the group containing the median.

  • n represents the total number of values.

  • B represents the cumulative frequency of the group before the median group.

  • G represents the frequency of the median group.

  • W represents the width of the group.

Syntax

statistics.median_grouped(data, interval)

Parameter value

Parameter

Description

data

This is a required argument. It contains the data values.

interval

This is an optional argument. It represents the class interval. The default value is 1.

Code example

Let’s look at how we can use the statistics.median_grouped() method to calculate the mean value for grouped continuous data:

import statistics

data1 = [1, 2, 3, 4, 5]
print(statistics.median_grouped(data1))

# using a step size of 2
print(statistics.median_grouped(data1, 2))

Code explanation

  • Line 1: We import the statistics module.
  • Line 3: We create a data variable called data1.
  • Line 5: We use the statistics.median_grouped() method to get the median value of the grouped data in data1.
  • Line 6: We use the statistics.median_grouped() method to get the median value of the grouped data, using an interval value of 2.

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python
method
statistics
median
communitycreator

CONTRIBUTOR

Onyejiaku Theophilus Chidalu

Grokking Modern System Design Interview for Engineers & Managers

Ace your System Design Interview and take your career to the next level. Learn to handle the design of applications like Netflix, Quora, Facebook, Uber, and many more in a 45-min interview. Learn the RESHADED framework for architecting web-scale applications by determining requirements, constraints, and assumptions before diving into a step-by-step design process.

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