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panicpotatoe/chi_square_example_01_p07.py

Created March 12, 2019 03:04
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chi_square_example_01_p07.py
# STEP 3: CALCULATE THE CHI SQUARE VALUE and CRITICAL VALUE
"""
Chi square formula:
chi square = total of [(observed - expected)^2]/expected
Note: We call .sum() twice: once to get the column sums
and a second time to add the column sums together,
returning the sum of the entire 2D table.
"""
chi_squared_stat = (((observed-expected)**2)/expected).sum().sum()
print(chi_squared_stat)
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