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Which of the following is the correct syntax to perform a Wilcoxon signed-rank test using SciPy?

easy📝 Syntax Q3 of 15
SciPy - Statistical Tests

Which of the following is the correct syntax to perform a Wilcoxon signed-rank test using SciPy?

Awilcoxon(x - y)
Bwilcoxon(x, y, alternative='two-sided')
Cwilcoxon(x, y=None)
Dwilcoxon(x, y)
Step-by-Step Solution
Solution:

  1. Step 1: Review SciPy wilcoxon function signature

    The function can take two related samples x and y, and an alternative hypothesis parameter.

  2. Step 2: Identify correct usage

    Passing x and y with alternative='two-sided' is correct syntax for two-sided test.

  3. Final Answer:

    wilcoxon(x, y, alternative='two-sided') -> Option B

  4. Quick Check:

    Correct wilcoxon syntax includes samples and alternative [OK]
Quick Trick: Use wilcoxon(x, y, alternative='two-sided') for paired test [OK]
Common Mistakes:
MISTAKES
  • Passing difference array instead of two samples
  • Omitting alternative parameter for direction
  • Using wilcoxon with only one sample incorrectly

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