Researchers wanted to know whether the Wii Fit (a Nintendo product with a balance board and games) has an impact on reaction time in older adults. All participants were tested using a standardized reaction time scale of 1-15 (a high score indicating better reaction time) noted for good reliability and validity. Older adults (all in good health) at a senior center were randomly assigned to either a Wii Fit group or a group that played strategy games via the Wii system. After a month, reaction time was tested (pre-testing found no differences between the groups) and the data are recorded below.

Wii Fit	Wii Strategy
12	4
8	5
3	4
9	5
5	7
8	8
10	10
12	3
4	6
8	2
9	3
7	2
8	7
7	4
10	8

1. What is the null hypothesis in this study?
2. What is the alternate hypothesis?
3. What probability should you use and why?
4. What are the degrees of freedom?
5. What is your computed answertvalue?
6. Based on yourtvalue, probability level, degrees of freedom, and critical value, is there a significant difference between the two groups?
7. Interpret your answer--are there differences between the groups? If so, which group performed better? Interpretation as it would appear in a scholarly journal article (i.e., use scientific language, and include the test statistic and p value as demonstrated in the week's lecture notes).
8. If you have made an error, would it be a Type I or a Type II error? Explain.