19. The following is a list of the life-change units (a score reflecting the amount of stress experienced as a result of stressful life events) reported by 50 participants in a study. Use an interval size of 25 life-change units to complete the grouped frequency distributions below. 150 175 375 210 400 216 300 175 374 163 263 152 176 185 192 197 233 216 241 221 232 316 233 357 321 368 300 278 298 254 274 216 285 219 276 222 245 264 233 361 242 304 251 176 221 165 212 222 196 196 Real Apparent Frequency Cumulative Relative Cumulative Cumulative Limits Limits Frequency Frequency Relative Percent Frequency - - . .. . .- - -.. . . .. .. 15