condition mean min max ZT0-3 21.07347 7.247159999999999 29.8072 ZT4-7 5.557085 5.557085 5.557085 ZT8-11 5.771855 5.771855 5.771855 ZT12-15 11.2999625 9.939175 12.66075 ZT16-19 16.516 16.516 16.516 ZT20-23 23.40335 23.40335 23.40335