condition mean min max ZT0-3 49.577555 49.577555 49.577555 ZT4-7 44.703303 44.703303 44.703303 ZT8-11 54.413737 54.413737 54.413737 ZT12-15 50.7016835 50.7016835 50.7016835 ZT16-19 54.057548 54.057548 54.057548 ZT20-23 57.35933250000001 57.35933250000001 57.35933250000001