Can a contrast with coefficients of — 1, — 1, — 1, and 3 be used to test this hypothesis? Why or why not?

A study was conducted to compare four approaches for alleviating agoraphobia: placebo, cognitive, behavioral, and cognitive plus behavioral. The researcher’s hypothesis is that the “cognitive plus behavioral” approach will be the most effective of the four approaches. Can a contrast with coefficients of — 1, — 1, — 1, and 3 be used to test this hypothesis? Why or why not?

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