condition mean min max ZT0-3 255.100902 255.100902 255.100902 ZT4-7 405.2966925 405.2966925 405.2966925 ZT8-11 435.067263 435.067263 435.067263 ZT12-15 472.647411 472.647411 472.647411 ZT16-19 329.60033350000003 329.60033350000003 329.60033350000003 ZT20-23 255.31505650000003 255.31505650000003 255.31505650000003