How to calculate quartiles and Inter Quartile Range (IQR) in Python?

by Amrita Mitra | Feb 9, 2023 | Statistics For Machine Learning

import numpy

data = [2, 1, 5, 3, 4, 8, 10, 7, 9, 6, 11, 13, 12]

q0 = numpy.quantile(data, 0)
q1 = numpy.quantile(data, 0.25)
q2 = numpy.quantile(data, 0.5)
q3 = numpy.quantile(data, 0.75)
q4 = numpy.quantile(data, 1)

print("Quartile 0: ", q0)
print("Quartile 1: ", q1)
print("Quartile 2: ", q2)
print("Quartile 3: ", q3)
print("Quartile 4: ", q4)

inter_quartile_range = q3 -q1

print("Inter-quartile Range: ", inter_quartile_range)

The output of the above program will be:

Quartile 0: 1
Quartile 1: 4.0
Quartile 2: 7.0
Quartile 3: 10.0
Quartile 4: 13
Inter-quartile Range: 6.0

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