Question

1) A researcher examines if the reading test scores increase from 5th to 6th grade and from 6th to 7th grade for middle school students. This is an example of which of the following for repeated measures ANOVA:

1- Within-subjects effect
2- Between-subjects effect
3- Interaction effect
4- Simple effect

2) A researcher examines if the reading test scores of ESL students differ based on country of origin. This is an example of which of the following for repeated measures ANOVA:

1- Within-subjects effect
2- Between-subjects effect
3- Interaction effect
4- Simple effect

3) A researcher conducted a study on the perception of a statistics course using a 5 point scale to measure students’ perception of their performance. The researcher included the variables of gender, grade level, and grade earned in the course. Which of the following variables did the researcher introduce as a covariant in the study?

1-Math performance perception
2-Gender of student
3-Grade level of student
4-Math grade student received in the course

4) Which of the following is an example of an interaction effect

1-The test for whether boys and girls differ in their reading test scores.
2-If the difference between boys and girls test scores is not consistent across different schools.
3-Whether the difference between boys and girls test scores is statistically significant and I want to know if it is statistically significant in School A.
4-I want to know the magnitude of the statistically significant difference between boys and girls test scores.

Answer 1

1.  Option: 1- Within-subjects effect (since within-subjects factors involve comparisons of the same subjects under different conditions)

2. Option: 2- Between-subjects effect (since we examine differences between individuals)

3. Option: 2-Gender of student

4. Option: 2-If the difference between boys and girls test scores is not consistent across different schools.