The U.S. Department of Transportation reported the accompanying data (see next page) on the number of speeding-related crash fatalities during holiday periods for the years from 1994 to 2003 (Traffic Safety Facts, July 20, 2005).
a. Compute the standard deviation for the New Year€™s Day data.
b. Without computing the standard deviation of the Memorial Day data, explain 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.
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 speeding-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.

Transcribed Image Text:

Speeding-Related Fatalities Holiday Period994 99 996 998 999 200o 20O 2002 New Year's Day 142 178 219 188 198 129 2003 178 185 202 166 218 72 197 179 179 210 183 219 138 169 162 205 134 Memorial Day July 4th Labor Day Thanksgiving Christmas 193 178 183 212 152 138 183 176 156 219 180 187 155 134 190 64 138 217 210 210 188 234 202 210 60 70 181 184 189 202 198 168 193