condition mean min max ZT0-3 0.658166 0.5584895000000001 0.7578425 ZT4-7 0.34480900000000003 0.34480900000000003 0.34480900000000003 ZT8-11 0.2504075 0.2504075 0.2504075 ZT12-15 0 0 0 ZT16-19 1.1779325 1.1779325 1.1779325 ZT20-23 1.0581425 1.0581425 1.0581425