condition mean min max ZT0-3 0.20126475 0.0 0.4025295 ZT4-7 1.58466 1.58466 1.58466 ZT8-11 1.192595 1.192595 1.192595 ZT12-15 0 0 0 ZT16-19 1.1854505 1.1854505 1.1854505 ZT20-23 0.79814 0.79814 0.79814