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QUESTION 4 An anesthesiologist at General Surgery Research Department conducted a study to access a significant difference in time taken for the three types of anesthetic to put patients' in-sleep condition before surgery. The time (in minutes) taken by patients to put in-sleep condition after taking the anesthetic is given below. Type 1 Type 2 Type 3 12 20 18 15 19 22 10 18 17 11 16 16 13 15 14 ANOVA Source of Sum of Degrees of Variation Squares Freedom Between Groups A 2 Within Groups 63.550 12 Total 160.933 14 a) Identify the response variable and the treatment of the study. (2 marks) b) Find the value of A. (4 marks) c) At a = 0.05, test whether there is no difference in the average time taken to put patients' in-sleep condition between the three types of anesthetic