condition mean min max ZT0-3 49.5059426475 35.68250425 63.329381045 ZT4-7 72.8999422075 71.565226225 74.23465819 ZT8-11 61.107510625 56.650159345000006 65.564861905 ZT12-15 34.382814447499996 27.790503479999998 40.975125415 ZT16-19 86.1891263575 65.03637612 107.341876595 ZT20-23 198.42206745 130.48908725 266.35504764999996