condition mean min max ZT0-3 0.8641692495 0.551556067 1.176782432 ZT4-7 1.1259833495 1.043454692 1.208512007 ZT8-11 1.04408265525 0.9954067825 1.092758528 ZT12-15 1.8839317205000001 1.3573781825 2.4104852585 ZT16-19 2.2261935825 2.006063288 2.446323877 ZT20-23 3.45070745775 3.0176056355 3.88380928