condition mean min max ZT0-3 1.0602719999999999 0.913389 1.207155 ZT4-7 1.2872185 1.2872185 1.2872185 ZT8-11 3.273535 3.273535 3.273535 ZT12-15 0 0 0 ZT16-19 1.743962 1.743962 1.743962 ZT20-23 1.82621 1.82621 1.82621