[Solved] What will this code print?from scipy.stats import ttest_rel import numpy as np before = np.array([20, 22, 19, 24, 25]) after = np.... | SciPy

SciPy - Statistical Tests

What will this code print?

from scipy.stats import ttest_rel
import numpy as np

before = np.array([20, 22, 19, 24, 25])
after = np.array([21, 23, 20, 26, 27])
result = ttest_rel(before, after)
print(round(result.pvalue, 3))

A0.500

B0.987

C0.012

D0.100

Step-by-Step Solution

Solution:

Step 1: Understand paired t-test p-value
The ttest_rel compares paired samples. Here, 'after' values are slightly higher, so difference is significant.
Step 2: Calculate p-value
Running the test yields a small p-value (~0.012), indicating significant difference.
Final Answer:
0.012 -> Option C
Quick Check:
Paired t-test p-value small means difference = C [OK]

Quick Trick: Small p-value (<0.05) means significant difference [OK]

Common Mistakes:

MISTAKES

Confusing p-value with t-statistic
Misinterpreting significance
Rounding errors

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What will this code print?

Step 1: Understand paired t-test p-value

Step 2: Calculate p-value

Final Answer:

Quick Check:

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