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:

Attentive Behavior (Min)

ConventionalReinforcement

12 30

20 41

25 32

14 15

16 47

40 50

38 39

36 35

29 20

33 40

(1)State the null hypothesis (use the language of the problem):

ANSWER: There is a difference in the attentive behavior of the two classes.

(1)State the alternative hypothesis (non-directional use the language of the problem

ANSWER: There is no difference in the attentive behavior of the two classes.

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

(2)SSconventional =(2) SSreinforcement=

(2)T=

(3)Compute omega squared and tell me what your value of omega squared means in the words of the problem

Omega squared =

(3)Cohen's d=

(3)Report the 95% confidence interval for the difference between the two means

(3) Conclusions (report your conclusions in the words of the problem)