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How to perform Chi-Squared test using SciPy?

Posted on March 29, 2021September 28, 2023 By Pythoneo

Let’s check how to perform Chi-Squared test using SciPy Python library.
python scipy chi squared test

Chi-square calculations

We will see how to calculate chi-squared test based on given numbers set. We will calculate ch-squared test using with scipy library because it offers built-in chisquare function which will do the job.

Chisquare returns pvalue. We can set 5.0% value level to determine if observed deviations are significant.

from scipy import stats

numbers = [45, 67, 33, 54, 33]

chi = stats.chisquare(numbers)

print(f"pvalue equals {round(chi.pvalue, 4)}")
if chi.pvalue < 0.05:
    print("Hypothesis can be rejected")
else:
    print("Hypothesis is valid")

See also  How to calculate geometric mean in Python?
Scipy Tags:chisquare, hypothesis, test

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