As an alternative method of evaluating a group home, suppose we take 12 adolescents who have been declared delinquent. We take the number of days truant during each of three time periods: (1) the month before they are placed in the home, (2) the month they live in the home, and (3) the month after they leave the home. The data are as follows:

Apply Friedman€™s test. What do you conclude?
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Adolescent Before During After 10 12 12 19 13 10 10 10 12 13 20 16 12 10 14 10 12 18 16