The records of three physicians chosen at random, at each of four offices of the Merrimack Valley Pediatric Clinic were audited in an attempt to determine their use of generic versus brand-name drugs when generic drugs were available. The following table gives the percentage of times each physician insisted on brand-name drugs for each of two weeks during Dec 2022, assume that the different weeks are replicates. Is there a difference in percentage of brand-name drugs prescribed between clinic locations? Is there a difference between physicians within clinic? Use a = .01 Percentage Use of Brand-Name Drugs Location Amesbury Amesbury Amesbury Andover Andover Andover Methuen Methuen Methuen Salem Salem Salem Physician Dr. Barros Dr. Russ Dr. Rastogi Dr. Maloney Dr. Franks Dr. Lawton Dr. Kohl Dr. Bruni-Masello Dr. Seth Dr. Earle Dr. Adams Dr. Klonizchii 1 Week 17 18 29 12 21 19 23 31 32 19 16 16 2 22 22 26 14 20 19 21 29 28 15 23 17