Parameters and statistics

DESCRIPTIVE STATISTICS Differentiating between parameters and statistics Charlie v se manager at a local hospital, wanted to know more about the hospital's full-time nurses. He polled 12 nurses at random who work full- time at the hospital. The findings in the poll were that these nurses take, on average, 5.5 sick days per year, that 50% of them would prefer a four-day work schedule, and that 8 of them are married. Charlie 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, 5.7 sick days per year, that 61% of them would prefer a four-day work schedule, and that 77 of them are married. (a) For Charlie's poll, identify the population and the sample. X ? Population: (Choose one) Sample: (Choose one) (b) Choose whether each number described below is a parameter or a statistic for Charlie's poll. Number Parameter Statistic The 50% of the randomly chosen nurses who prefer a four-day work schedule O O The 77 nurses who are married among all the full-time nurses at the hospital O O The average of 5.5 sick days per year taken among the randomly chosen nurses O O