# Test of hypothesis using dependent samples

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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.

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##### Solution Summary

Tests differences between means with dependent samples.

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