A researcher conducts a study of different instructional methods. The researcher wants to examine if student scores will increase as the instructional time increases. She randomly assigned 60 students to three classes. Each class spent 4 hours, 5 hours, and 6 hours per day, respectively, on instruction. Then she compared the average scores of the three classes. Which procedure is the most appropriate for this research question?
A) Dunnett method
B) Dunn (Bonferroni) method
C) Tukey HSD
D) Trend analysis

Question

Quizplus · Accepted Answer

The groups represent different quantitative levels of a ratio-scaled variable, i.e., instructional time.)

A Researcher Conducts a Study of Different Instructional Methods