Question: A random sample of 122 delinquent boys was selected and randomly divided into two groups . The researcher was interested in discovering whether a six-week, nondirective, individual therapy program would affect levels of measured anxiety. The boys in group A all received the therapy, whereas those in group B did not. Both groups were then given an anxiety-level test (high scores indicating more anxiety).

The data were as follows:

1. Do you accept or reject the null hypothesis?
2. Is there a significant difference in the anxiety test scores between the two groups?
3. What type of research is this, post facto or experimental?
4. Identify both the IV and DV.

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