1 .A video game developer is testing a new game on three different groups. Each group represents a different target market for the game. The developer collects scores from a random sample from each group. Show all work to receive credit. Include a table of your results.

Group A. Group B Group C

101. 151. 101

108. 149. 109

98. 160 198

107 112 186

111 126 160

What is the df(Between)?

What is the df(Within)?

What are the SS_betweenand MS_between?

What are the SS_withinand MS_within?

What is the F Statistic?

At the 5% significance level, are the scores among the different groups different? Find the to answer this question (including IV and DV).

2.A researcher wanted to know if there was a correlation between the number of times a boxer incurred head injuries (traumatic encephalopathy) to depression scores reported by the same individuals. The data for 10 boxers (number of injuries and depression scores from 0-10 where 0 means no depression) is as follows:

Number of brain injuries DEPRESSION SCORE

0 1

9 10

4 7

7 8

2 1

1 0

8 10

5 5

0 2

4 6

a. Use the four steps of hypothesis testing and calculate a Pearson correlation for the above data, starting with the hypotheses.

b. Find critical value at an alpha level at =.05, two tailed.

c. Include the coefficient of determination with a sentence explaining the outcome of both calculations in Written form.

d. Make a scatter plot by hand of the above data set.