condition mean min max ZT0-3 33.41991 33.41991 33.41991 ZT4-7 37.9052545 37.9052545 37.9052545 ZT8-11 43.893455 43.893455 43.893455 ZT12-15 41.3045505 41.3045505 41.3045505 ZT16-19 37.124505 37.124505 37.124505 ZT20-23 34.762202 34.762202 34.762202