A Clinical Psychologist Is Interested in Comparing the Effectiveness of Short

question 149

Multiple Choice

A clinical psychologist is interested in comparing the effectiveness of short term relaxation and cognitive-behavioral therapy in treating mild depression. An experiment is conducted in which 15 patients with mild depression are randomly selected and assigned 5 each to a relaxation therapy group, a cognitive/behavioral therapy group, and an attention placebo group. Therapy is administered until the patient is judged no longer depressed or until 10 treatment sessions have elapsed. The following data is obtained. Scores are the number of sessions for each patient. Using the HSD test with a = .05, what is your conclusion?

• A) retain H 0 ; we cannot conclude the two therapies differ in effectiveness
• B) reject H 0 ; the two therapies appear to differ in effectiveness
• C) retain H 0 ; the two therapies have the same effectiveness
• D) reject H 0 ; the two therapies are not significantly different

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Definitions:

Spreadsheet

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Linear Function

A mathematical function that produces a graph of a straight line and is defined by an equation of the first degree.

Polynomial Function

A mathematical expression consisting of variables, coefficients, and non-negative integer exponents, summed together.

Price Elasticity

A measure of how much the quantity demanded of a good responds to a change in the price of that good, indicating its sensitivity to price changes.