A psychologist was interested in comparing attitudes towards therapy based on di

Question

A psychologist was interested in comparing attitudes towards therapy based on different types of treatment settings. She randomly selected 20 patients in individual therapy, 20 patients in group therapy, and 20 patients in blended therapy and gave them an assessment that measured attitude. What is the value of N in this study? How many factors are there? How many levels of each factor are there? What is the dependent variable and independent variable? What is the appropriate Ho and Ha for ANOVA? In the study described above regarding the treatment settings, suppose you get a significant Fobt. What conclusion would you make in the context of this study?

Explanation / Answer

Value of N (total number of experimental units)=20+20+20=60

Factor srepresent variables whose levels are manipulated by experimenter. There are three factors.

Level represent specific values that the experimenter chooses for a factor. Here, exists 3 levels.

Dependent variable: Attitude

Independnet variable: Three different therapies.

H0:mu1=mu2=mu3 (All three mean attitude values are same)

H1: At least one meana attitude value differs from another.

The conclusion would be that there exists difference among the mean attitude values corresponding to treatments.

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