Test of hypothesis using dependent samples
November 15th, 2022
A group of 10 students was pretested before instruction and posttested 6 weeks of instruction with the following achievement scores:
Student Before After Difference
1 14 17 3
2 12 16 4
3 20 21 1
4 8 10 2
5 11 10 -1
6 15 14 -1
7 17 20 3
8 18 22 4
9 9 14 5
10 7 12 5
Is there evidence of an improvement in achievement over this 6-week period? Justify using an appropriate statistical test.
