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Unit 2 · Research Methodology & Statistics Psychology · June 2023 · 15 Jun

A study was conducted to find out whether participation in meditation influences well-being in children. Hence a group of children who had not participated in meditation before but were now planning to begin participating in meditation were given a well-being scale before they began meditation. The children were administered the same test again after 2 months of meditation. Well-being was measured on an interval scale, with higher scores indicating higher well-being. The scores on the scale were normally distributed. The scores (Before → After) are: 4 → 6, 8 → 5, 10 → 11, 12 → 10, 14 → 15, 16 → 17, 18 → 16.

What are the degrees of freedom for the test?

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Correct answer: C. 6

Explanation

There are 7 before–after pairs, so the paired t-test has df = n − 1 = 6.

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