condition mean min max ZT0-3 1.30003657 0.93633615 1.66373699 ZT4-7 20.867470790749998 8.9786575115 32.75628407 ZT8-11 128.3850737825 101.470536515 155.29961105 ZT12-15 1431.5804157 1219.1086694 1644.052162 ZT16-19 1051.979576975 978.48066045 1125.4784935000002 ZT20-23 925.260310175 792.2515991 1058.26902125