A social psychologist has been studying the relationship between group composition and level of cooperation on the part of preschool children in a task-completion exercise. Each group is observed, and the number of cooperative acts exhibited by each member of the group is recorded. Three types of groups are under study: all male, all female, and mixed (both male and female members). Results of the investigation are as follows:
![430_relationship between group composition and level of cooperation.png](https://secure.tutorsglobe.com/CMSImages/430_relationship between group composition and level of cooperation.png)
a. State an appropriate null hypothesis.
b. What are the values of each category mean?
c. What is the value of the grand mean?
d. What is the value of the SSB?
e. What is the value of the SSW?
f. What is the value of the dfB?
g. What is the value of the dfW?
h. What is the value of the MSW?
i. What is the value of the MSB?
j. What is the value of F?
k. Assuming you were working at the .05 level of significance, what would you conclude?