condition mean min max ZT0-3 1.2602337605 0.864665976 1.655801545 ZT4-7 1.93860164175 1.5470910315 2.330112252 ZT8-11 1.868946929 1.814053351 1.923840507 ZT12-15 1.719030998 1.4648147464999999 1.9732472495 ZT16-19 2.2079222124999998 1.4350880915 2.9807563335 ZT20-23 4.096409403999999 3.3235843039999997 4.869234504