condition mean min max ZT0-3 0.0352674505 0.007948867 0.062586034 ZT4-7 0.18307852325 0.062498451 0.3036585955 ZT8-11 0.35586744875000004 0.32468970100000005 0.3870451965 ZT12-15 0.53906587575 0.49014944949999995 0.587982302 ZT16-19 0.71580814275 0.4449083145 0.9867079710000001 ZT20-23 1.2358687835 0.9876735225 1.4840640445000002