A common assumption is that old age effects memory.To test this assumption, volunteer participants were randomly selected from different age groups, 25, 45, 65, and 85 and given a battery of memory tasks to complete.Memory scores were computed and are provided below.The scores below reflect the number of errors on the memory tasks.Thus, a high score reflects more memory difficulties and a low score reflects good memory task completion. Compute the appropriate test to determine if age has an impact on memory.

25 year olds	45 year olds	65 year olds	85 year olds
0	9	3	2
4	7	2	2
2	9	4	4
5	5	5	3
6	7	1	4
2	8	3	5
4	12	4	2
3	8	5	3

1. What statistical test will you use and why?
2. What is your computed answer?
3. What probability level should you use and why?
4. What is your degrees of freedom?
5. Will you reject or fail to reject the null hypothesis? Why?
6. What would be the best way to answer if you were writing it for a journal article?
7. What does your answer tell you about the relationship between age and memory performance? Be specific. If there are differences between groups, indicate how you know which differences are significant.
8. If you made an error, was it Type I or Type II? Explain why.