A school psychologist wishes to study the influence of three new curricula plans on the history achievement of junior high school students. Although the groups of students were selected on a fairly random basis, the psychologist has learned that there is considerable disparity among the groups with respect to verbal aptitude. NOT RBD but other design.**
What is the appropriate design to use in this study?
Why is the design you named about appropriate?
List ALL variables involved in this design:
State the appropriate research question:
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