Suppose a government organization reported the accompanying data on the number of speed-related crash fatalities during holiday periods for the years from 1994 to 2003.
Speed-Related FatalitiesHoliday Period1994199519961997199819992000200120022003New Year's Day1431441767621913817113421070Memorial Day195176185197138183156190188181July 4th17821920217916917821964234184Labor Day189188166179162171180138202189Thanksgiving212198218210203168187217210202Christmas1521296618313419115521060198(a)Calculate the standard deviation for the New Year's Day data. (Round the answer to three decimal places.)(b)Without calculating the standard deviation of the Memorial Day data, determine whether the standard deviation for the Memorial Day data would be larger or smaller than the standard deviation of the New Year's Day data.largersmaller(c)Memorial Day and Labor Day are holidays that always occur on Monday and Thanksgiving always occurs on a Thursday, whereas New Year's Day, July 4th, and Christmas do not always fall on the same day of the week every year. Based on the given data, is there more or less variability in the speed-related crash fatality numbers from year to year for same day of the week holiday periods than for holidays that can occur on different days of the week? Support your answer with appropriate measures of variability. (Round your answers to three decimal places.)The standard deviations for Memorial Day, Labor Day, and Thanksgiving are , , and , respectively. The standard deviations for New Year's Day, July 4th, and Christmas are , , and , respectively. The standard deviations for the same day of the week holidays are all than all of the standard deviations for the holidays that can occur on different days of the week. There is variability for the holidays that always occur on the same day of the week.
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