A clinical psychologist wants to determine whether group therapy sessions are ef

Question

A clinical psychologist wants to determine whether group therapy sessions are effective in treating anxiety disorders. He has 20 clients from a therapy group complete an anxiety inventory where higher scores indicate increased levels of anxiety and compares their scores to published norms for the general population. To answer the psychologist's question, we can set it up as a hypothesis testing problem and use the data collected to answer it. Complete the following to show how this would be done

Explanation / Answer

In this question, we can easily set up a hypothesis problem and test whether group therapy sessions are effective in treating anxiety disorders. This says that mean anxiety disorders score is same in group therapy. We can use t -test for this becuase sample size is less than 30 and standard deviation is unknown.

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