condition mean min max ZT0-3 316.35 316.35 316.35 ZT4-7 410.8 410.8 410.8 ZT8-11 484.15 484.15 484.15 ZT12-15 811.5999999999999 811.5999999999999 811.5999999999999 ZT16-19 716.65 716.65 716.65 ZT20-23 487.75 487.75 487.75