condition mean min max ZT0-3 1.2058373478333333 0.0 2.4116746956666666 ZT4-7 4.152749578 0.0 8.305499156 ZT8-11 2.3293668000000003 0.0 4.658733600000001 ZT12-15 0.0 0.0 0.0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0