Guarantors' Mutual, an insurance company, wants to compare the difference in repair costs of moderately damaged cars at two shops. They select a random sample of 1'2 moderately damaged cars, take each car to both shops. and ask how much the necessary repairs will cost. When they receive the cost estimates for each car, they subtract the cost at the tirst shop from the cost at the second shop, like this: d=cost at second shopcost at rst ShOp{\"\ ersion\":\"1.1\