condition mean min max ZT0-3 12.72375 12.72375 12.72375 ZT4-7 11.863475 11.863475 11.863475 ZT8-11 12.0949935 12.0949935 12.0949935 ZT12-15 12.7280915 12.7280915 12.7280915 ZT16-19 13.4059245 13.4059245 13.4059245 ZT20-23 11.516246 11.516246 11.516246