Q2. A group of 20 students were given an achievement test under two conditions: (i) when tense (ii) when relaxed. Test the significance of the difference between means at .05 level on the basis of the...

Extracted text: Q2. A group of 20 students were given an achievement test under two conditions: (i) when tense (ii) when relaxed. Test the significance of the difference between means at .05 level on the basis of the following data: Roll No. Score when Score when Roll No. Score when Score when tense relaxed tense relaxed 18 20 11 10 10 16 22 12 8 12 18 24 13 20 22 4 12 10 14 12 14 20 25 15 16 12 6. 17 19 16 16 20 7 18 20 17 18 22 8. 20 21 18 20 24 9. 22 23 19 18 23 10 20 20 20 21 17