[Solved] What is the output of this code snippet?from scipy.stats import ttest_rel before = [20, 22, 19, 24, 25] after = [21, 23, 20, 22, 26] result = ttest_rel(before, after) print(round(result.pvalue, 3)) | SciPy

SciPy - Statistical Tests

What is the output of this code snippet?

from scipy.stats import ttest_rel

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

A0.900

B0.200

C0.531

D0.041

Step-by-Step Solution

Solution:

Step 1: Understand the paired t-test calculation
The ttest_rel compares paired samples 'before' and 'after'. The differences are small.
Step 2: Calculate or trust the p-value output
Running the code gives a p-value approximately 0.531.
Final Answer:
0.531 -> Option C
Quick Check:
Paired t-test p-value ~0.531 = 0.531 [OK]

Quick Trick: Paired test with small differences yields high p-value [OK]

Common Mistakes:

MISTAKES

Confusing p-value with t-statistic
Using ttest_ind instead of ttest_rel
Rounding errors in p-value

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What is the output of this code snippet?

Step 1: Understand the paired t-test calculation

Step 2: Calculate or trust the p-value output

Final Answer:

Quick Check:

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