12. An insurance company is analyzing the cost of a femur fracture and tibia fracture at two hospitals. Given the following costs in dollars, determine if there is a significant difference in the cost of surgery at each hospital using an appropriate a level and comment on the results.

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Hospital A B TYPE OF SURGERY Tibia Fracture Femur Fracture 1325, 1250 1125, 1075 900, 850 1050, 1025