Difference between the pre and post test

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A teacher wants to see if a new unit on taking square roots is helping students learn. She has five randomly selected students take a pre-test and a post test on the material. The scores are out of 20. Has there been improvement? (pre-post)

Student

1

2

3

4

5

Pre-test

12

14

11

12

13

Post- Test

15

17

15

20

13

What is the point estimate of the population mean difference between the pre and post test?

Reference no: EM132171714

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