7. You are a registered nurse working in an eating disorders clinic, and you are interested in exploring whether various treatments for anorexia result in differences in weight before and after the treatments. You have collected before and after weights on clients in your clinic who underwent three treatments for anorexia. The date set for the study is in the Date folder in A2L Contents, is called Q7_ANOREX, and consists of the following variables: Treat (Cont = control treatment, CBT = cognitive behavioural therapy, FT = family-based treatment), Prewt (weight in kg before anorexia treatment), and Postwt (weight in kg after anorexia treatment). Use these data to answer the questions below. a. Conduct the appropriate statistical test to determine if there is a difference in the before treatment and after treatment weights for clients that received CBT . Assume 0=0.05 . Show all calculations . [2 Marks ] b. What is the p-value for the test you performed in question a above ? Does this p-value support the conclusion you reached in question a? Explain . [1 Mark ] c. Conduct the appropriate statistical test to determine if the before treatment weight is less than the after-treatment weight for clients that received CBT. Assume a=0.05