The American Veterinary Association claims that the annual cost of medical care for dogs averages 100 with a standard deviation of30. The cost for cats averages 120 with a standard deviation of35. Some basic algebraic and statistical steps show us that the average of the difference in the cost of medical care for dogs and cats is then 100 –120 = –20. The standard deviation of that same difference equals46. If the difference in costs follows a Normal distribution, what is the probability that the

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Pets. The American Veterinary Association claims that the annual cost of medical care for dogs averages 100, with a standard deviation of 30, and for cats averages 120, with a standard deviation of 35. a) What's the expected difference in the cost of medical care for dogs and cats? b) What's the standard deviation of that difference? c) If the costs can be described by Normal models. what's the probability that medical expenses are higher for someone's dog than for her cat? d) What concerns