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A hospital conducted a study of the waiting time in its emergency rooms. Thehospital has a main campus and three satellite locations. A random sample ofemergency room waiting times at each location were randomly selected.At the .05 level of significancea. Is there evidence of a difference in the mean waiting times at the four locations?b. If appropriate, determine which locations differ in mean waiting times.c. Is there evidence of a difference in the variation in waiting times among thefour locations?