A psychologist is interested in the effects of animal therapy on kids who have an anxiety disorder. She knows that the population mean on a test of anxiety for these kids is 71.50 with a standard deviation of 8. She collects a sample of 26 children and exposes them to therapy dogs for a period of 6 months. She then tests their anxiety levels and obtains a mean of 68.4. A. Test the hypothesis that therapy dogs reduce anxiety in children with an anxiety disorder. Use an alpha level of .05. Must show the sampling distribution, label either the critical value(s)/rejection region(s), or plot the test statistic and identify the p-value. Either method of conducting the hypothesis test is acceptable. B. Compute a 95% confidence interval for the mean anxiety of kids who undergo animal therapy and report it using proper notation. C. Compute the effect size and interpret it using Cohen's guidelines