condition mean min max ZT0-3 23.8025100975 23.040302625000002 24.56471757 ZT4-7 12.869267762 12.466033009 13.272502515 ZT8-11 22.98154977 15.599660335 30.363439205000002 ZT12-15 24.417919060000003 22.14275404 26.693084080000002 ZT16-19 12.79045706675 11.98781528 13.593098853499999 ZT20-23 11.07618081075 9.8107586365 12.341602985