condition mean min max ZT0-3 0.3569881925 0.039227665 0.6747487200000001 ZT4-7 1.648963957 1.117115821 2.180812093 ZT8-11 2.7658270194999997 2.1440316394999996 3.3876223995 ZT12-15 3.50771309625 3.25800431 3.7574218825 ZT16-19 2.4618168375 2.2435142725 2.6801194025 ZT20-23 4.0668773625 3.4943307085 4.6394240165