condition mean min max ZT0-3 10.565718333333333 5.0253499999999995 16.54955 ZT4-7 15.2797 15.2797 15.2797 ZT8-11 13.5388 13.5388 13.5388 ZT12-15 14.157699999999998 12.81205 15.50335 ZT16-19 12.84805 12.84805 12.84805 ZT20-23 10.94067 10.94067 10.94067