[Solved] Examine this code snippet:from scipy.stats import mannwhitneyu x = [3, 5, 7] y = [2, 4, 6] result = mannwhitneyu(x, y, alternative='less', use_continuity=True) print(result.statistic, result.... | SciPy

SciPy - Statistical Tests

Examine this code snippet:

from scipy.stats import mannwhitneyu
x = [3, 5, 7]
y = [2, 4, 6]
result = mannwhitneyu(x, y, alternative='less', use_continuity=True)
print(result.statistic, result.pvalue)

What is the issue with this code?

AThe alternative hypothesis 'less' is invalid for mannwhitneyu

BThe parameter 'use_continuity' is deprecated and should not be used

CThe samples x and y must be numpy arrays, not lists

DThe print statement should use result.stat instead of result.statistic

Step-by-Step Solution

Solution:

Step 1: Check parameters of mannwhitneyu
In recent scipy versions, the parameter 'use_continuity' has been deprecated and removed.
Step 2: Validate alternative parameter
'less' is a valid alternative hypothesis option.
Step 3: Input types
Lists are acceptable inputs; conversion to numpy arrays is not mandatory.
Step 4: Attribute names
The result object has attributes 'statistic' and 'pvalue', not 'stat'.
Final Answer:
The parameter 'use_continuity' is deprecated and should not be used -> Option B
Quick Check:
Check scipy docs for deprecated parameters [OK]

Quick Trick: Avoid deprecated parameters like use_continuity [OK]

Common Mistakes:

MISTAKES

Using deprecated parameters without checking docs
Confusing attribute names of result object
Assuming lists are invalid inputs

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Examine this code snippet:

Step 1: Check parameters of mannwhitneyu

Step 2: Validate alternative parameter

Step 3: Input types

Step 4: Attribute names

Final Answer:

Quick Check:

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