condition mean min max ZT0-3 44.982346 44.982346 44.982346 ZT4-7 74.35717299999999 74.35717299999999 74.35717299999999 ZT8-11 73.8756555 73.8756555 73.8756555 ZT12-15 55.4287555 55.4287555 55.4287555 ZT16-19 54.282548500000004 54.282548500000004 54.282548500000004 ZT20-23 52.3994565 52.3994565 52.3994565