Bird
0
0

What does the dof variable represent in the output of chi2_contingency?

medium📝 Conceptual Q5 of 15
SciPy - Statistical Tests

What does the dof variable represent in the output of chi2_contingency?

ADegrees of freedom of the test
BDifference of frequencies
CData observed frequency
DDistribution of features
Step-by-Step Solution
Solution:

  1. Step 1: Understand output variables of chi2_contingency

    The function returns chi2 statistic, p-value, degrees of freedom (dof), and expected frequencies.

  2. Step 2: Define degrees of freedom

    Dof is the number of independent values that can vary in the contingency table.

  3. Final Answer:

    Degrees of freedom of the test -> Option A

  4. Quick Check:

    dof means degrees of freedom [OK]
Quick Trick: dof = independent values count in contingency table [OK]
Common Mistakes:
MISTAKES
  • Confusing dof with observed or expected counts
  • Thinking dof is a frequency difference
  • Misunderstanding statistical terms

Want More Practice?

15+ quiz questions · All difficulty levels · Free

Free Signup - Practice All Questions
More SciPy Quizzes
Constants and Special Functions - Special functions overview (scipy.special) - Quiz 2easy Linear Algebra (scipy.linalg) - Matrix determinant (det) - Quiz 6medium Linear Algebra (scipy.linalg) - Solving linear systems (solve) - Quiz 3easy SciPy Basics and Scientific Computing - SciPy vs NumPy relationship - Quiz 3easy SciPy Basics and Scientific Computing - SciPy module organization - Quiz 15hard SciPy Basics and Scientific Computing - Why SciPy exists - Quiz 14medium Sparse Matrices (scipy.sparse) - COO format (Coordinate) - Quiz 8hard Statistical Functions (scipy.stats) Basics - Why statistics quantifies uncertainty - Quiz 3easy Statistical Tests - Mann-Whitney U test - Quiz 6medium Statistical Tests - Wilcoxon signed-rank test - Quiz 7medium