Charmaine, a nurse manager at a local hospital, wanted to know more about the hospital's full-time nurses. She polled 20 nurses at random who work full-time at the hospital. The findings in the poll were that these nurses take, on average, 6.2 sick days per year, that 65% of them would prefer a four-day work schedule, and that 5 of them are married. Charmaine didn't know that the top hospital administrators had already surveyed all nurses who work full-time at the hospital. In that survey, it was found that the nurses take, on average, 7.2 sick days per year, that 59% of them would prefer a four-day work schedule, and that 72 of them are married. (a) For Charmaine's poll, identify the population and the sample. Population: (Choose one) Sample: (Choose one) (b) Choose whether each number described below is a parameter or a statistic for Charmaine's poll. Number The 5 randomly chosen nurses who are married The 65% of the randomly chosen nurses who prefer a four-day work schedule The average of 7.2 sick days per year taken among all the full-time nurses at the hospital 5350 Parameter 1 O O Statistic 1 O O X Ś ? 8 6

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