A librarian is interested in the numbers of books that visitors check out from the library. She examines the checkout records of 250 randomly selected adult visitors. Identify the population and sample for this situation.
A The population is all visitors of the library; the sample is the adult visitors of the library. B The population is all adult visitors of the library; the sample is the 250 visitors selected. C The population is all visitors who check out at least 1 book from the Library; the sample is the 250 visitors selected. D The population is the 250 visitors selected; the sample is the 250 visitors who check out at least 1 book from the library.
