In a study of different instructional methods, if the researcher is only interested in comparing the scores of the class taught by the traditional method against each of the classes taught by the alternative methods, which procedure should she use?
A) Dunnett method
B) Dunn (Bonferroni) method
C) Tukey HSD
D) Trend analysis

Question

Quizplus · Accepted Answer

The Dunnett method is specifically designed for comparing a control group (in this case, the class taught by the traditional method) against each of several treatment groups (the classes taught by alternative methods) without inflating the Type I error rate. This makes it the appropriate choice for the scenario described.

In a Study of Different Instructional Methods, If the Researcher