On each trial of an experiment, a subject is presented with a constant soft noise, which is interrupted at some unpredictable time by a noticeably louder sound. The time it takes for the subject to react to this louder sound is recorded. The following list contains the reaction times (in milliseconds) for the19trials of this experiment:

269,271,231,212,164,235,296,241,175,273,311,202,236,229,186,193,257,226,152

Find30^thand75^thpercentilesfor these reaction times.

(a)The30^thpercentile: ____ milliseconds

(b)The75^thpercentile: ____ milliseconds