38. An education researcher was interested in examining the eect of the teaching method

and the teacher on students' reading levels. 257 students participated in an experi-

ment. There were two dierent teachers (Juliana and Felix) and three dierent teaching

methods (A, B, and C). Students were randomly assigned to a teaching method and

teacher. At the end of the semester the students took a reading test on which they

received a score out of 20. Students who studied with Felix using method B achieved

the highest scores. Identify the factor(s) in the experiment and the number of levels

for each.

(a) Score on reading test (20 levels)

(b) The teacher and teaching method combination (6 levels)

(c) Juliana and method A, Juliana and method B, Juliana and method C, Felix

and method A, Felix and method B, Felix and method C (6 levels)

(d) Teaching method (3 levels), teacher (2 levels), score on reading test (20 levels)

(e) Teaching method (3 levels) and teacher (2 levels)