condition mean min max ZT0-3 1.10899425 1.026389 1.1915995000000001 ZT4-7 1.2323650000000002 1.2323650000000002 1.2323650000000002 ZT8-11 0.8213385 0.8213385 0.8213385 ZT12-15 0 0 0 ZT16-19 1.0988820000000001 1.0988820000000001 1.0988820000000001 ZT20-23 1.24993 1.24993 1.24993