Percentile

RE which is interrupted at some unpredictable time by a noticeably louder On each trial of an experiment, a subject is presented with a constant soft noise, The following list contains the reaction times (in milliseconds) for the sound. The time it takes for the subject to react to this louder sound is recorded. 18 trials oi this experiment: 296, 257, 164, 285, 222, 269, 250, 273, 226, 202, 235, 236, 186, 171, 311, 152, 241, 217 ' . HI Iii _ . . Find 25 and 90 percentiles for these reaction times. (If necessary, consult a W.) (a) The 25th percentile: D milliseconds (b) The 90th percentile: D milliseconds