Eight students were given a quiz before & after they took review classes had the following...

Eight students were given a quiz before & after they took review classes had the following ratings:

Before	After
5	6
6	6
4	9
4	6
4	5
5	6
8	9
7	10

What is the critical value at the .05 level of significance?

What is the test statistic?

At an .05 level of significance, can we conclude that the review classes were helpful?

Using the data above, assume that these were scores of two groups of 8 students on the quiz either before or after the review class.

What is the critical value at the .05 level of significance?
What is the test statistic?
At an .05 level of significance, can we conclude that the review classes were helpful

Expert Solution

Ans

Obs	Before	After	d=After - Before	d2
1	5	6	1	1
2	6	6	0	0
3	4	9	5	25
4	4	6	2	4
5	4	5	1	1
6	5	6	1	1
7	8	9	1	1
8	7	10	3	9
SUM =			14	42

orchestra answered 2 years ago

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