You have test scores of 10 students before and after a training program. You want to check if the training improved scores significantly. Which test should you use and why?

hard📝 Application Q15 of 15

SciPy - Statistical Tests

AUse <code>ttest_ind</code> because the groups are independent.

BUse <code>ttest_rel</code> because the scores are paired measurements.

CUse <code>ttest_ind</code> because it handles paired data better.

DUse neither; a correlation test is needed.

Step-by-Step Solution

Solution:

Step 1: Identify the data type
Scores before and after training are from the same students, so data are paired.
Step 2: Choose the correct t-test
ttest_rel is designed for paired samples to compare means before and after treatment.
Final Answer:
Use ttest_rel because the scores are paired measurements. -> Option B
Quick Check:
Paired data needs ttest_rel = Use ttest_rel because the scores are paired measurements. [OK]

Quick Trick: Paired before-after data use ttest_rel [OK]

Common Mistakes:

MISTAKES

Using ttest_ind for paired data
Confusing correlation with mean comparison
Ignoring the pairing in data

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You have test scores of 10 students before and after a training program. You want to check if the training improved scores significantly. Which test should you use and why?

Step 1: Identify the data type

Step 2: Choose the correct t-test

Final Answer:

Quick Check:

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