A teacher wishes to test the effects of using reinforcement versus a conventional method for maintaining classroom deportment. Twenty different teachers are instructed on the techniques to be used in the study; 10 on the conventional method and 10 on using reinforcement. Data was gathered on the number of minutes of attentive behavior in an hour sample taken from a class of each teacher when the classes were being taught the same material. The classrooms were chosen because they were not significantly different in terms of socioeconomic status or past educational experiences. The data are as follows:

Table: Minutes of Attentive Behavior

Conventional	Reinforcement
12	30
20	41
25	32
14	15
16	47
40	50
38	39
36	35
29	20
33	40

Show all of your work. Do not just show the answer show the components that went into the answer along with the answer.

1. SSconventional (2 points)
2. SSreinforcement (2 points)
3. T (1 point)
4. Compute omega squared and tell me what your value of omega squared means in the words of the problem (1 point).

Omega squared =

1. Cohen's d (3 points)
2. Report the 95% confidence interval for the difference between the two means (3 points).
3. Conclusions (report your conclusions in the words of the problem) (3 points)