condition mean min max ZT0-3 0.6771008735 0.22006057 1.134141177 ZT4-7 2.3441576115 1.780912491 2.907402732 ZT8-11 5.5742788985 4.6599425945 6.4886152025 ZT12-15 8.53361510725 8.489932365000001 8.5772978495 ZT16-19 5.5387444055 5.490097629 5.587391182 ZT20-23 4.80080611975 4.1926618005 5.408950439