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A school psychologist wishes to study the influence of three new curricula plans on the history...

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:

Math   Statistics-And-Probability   
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