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There are exactly 5 people in a bookstor...

There are exactly 5 people in a bookstore at 12:00 p.m. Each person earns an annual income that is between $ 30,000 and $35,000. No one enters or leaves the bookstroes until 12:15 p.m., when a professional athlete with an annual income of more that $ 1,000,000 enters the bookstore and joins the other 5 people. The mean, median , range and standard deviation of the annual incomes of the 5 people in the bookstore at 12:00 p.m., are calculated and compared to the same 4 statisties of the annual incomes of the 6 people in the bookstore at 12:15 p.m. If it can be determind, which of the 4 statistics changed the least?

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