condition mean min max ZT0-3 119.539749 119.539749 119.539749 ZT4-7 146.041536 146.041536 146.041536 ZT8-11 155.2312645 155.2312645 155.2312645 ZT12-15 116.803991 116.803991 116.803991 ZT16-19 142.27471400000002 142.27471400000002 142.27471400000002 ZT20-23 120.72582650000001 120.72582650000001 120.72582650000001