Assignment:
1. To study the effectiveness of three spelling methods, 45 subjects are random from the fourth graders in a particular elementary school. Based on the order of their IQ scores, subjects are grouped into IQ groups (low =75-99, average= 100-115, high= 116-130), 15 in each group. Subjects in each group are randomly assigned to one of the three methods of spelling, five each. Which of the following methods ISemployed here?
a. Predefined value blocking
b. Predefined range blocking
c. Sampled value blocking
d. Sampled range blocking
2. If three teachers employ method A and three other teachers employ method B, then which one of the following is suggested?
a. Teachers are nested within method.
b. Teachers are crossed with methods.
c. Methods are nested within teacher.
d. Cannot be determined.
3. In a two-factor design, factor A is nested within factor B for which one of the follow
a. At each level of A, each level of B appears.
b. At each level of A, unique levels of B appear.
c. At each level of B, unique levels of A appear.
d. Cannot be determined.
4. If factor C is nested within factors A and B, this is denoted as AB(C). True or false?
5. To determine if counselling method E is uniformly superior to method C for the population of counselors, from which random samples are taken to conduct a study, one needs a nested design with a mixed model. True or false?
6. For the interaction to be tested in a two-factor randomized block design, it is requiredthat which one of the following occurs?
a. Both factors be fixed
b. Both factors be random
c. n = 1
d. n>1
7. In a randomized block study, the correlation between the blocking factor and the dependent variable is .35. I assert that the residual variation will be smaller when using the blocking variable than without. Am I correct?
8. In a two-factor hierarchical design with two levels of factor A and three levels of factor B nested within each level of A, how many F ratios can be tested?
a. 1
b. 2
c. 3
d. Cannot be determined
9. IQ must be used as a treatment factor. True or False?