condition mean min max ZT0-3 0.4069495 0.4069495 0.4069495 ZT4-7 0.24313600000000002 0.24313600000000002 0.24313600000000002 ZT8-11 0.2379515 0.2379515 0.2379515 ZT12-15 0.7976125000000001 0.7976125000000001 0.7976125000000001 ZT16-19 0.906363 0.906363 0.906363 ZT20-23 0.4843905 0.4843905 0.4843905