condition mean min max ZT0-3 2488.486694 2488.486694 2488.486694 ZT4-7 3573.0838705 3573.0838705 3573.0838705 ZT8-11 3633.645765 3633.645765 3633.645765 ZT12-15 3092.747483 3092.747483 3092.747483 ZT16-19 3003.7697745 3003.7697745 3003.7697745 ZT20-23 3194.1289134999997 3194.1289134999997 3194.1289134999997