condition mean min max ZT0-3 257.55 257.55 257.55 ZT4-7 205.4 205.4 205.4 ZT8-11 167.85000000000002 167.85000000000002 167.85000000000002 ZT12-15 168.55 168.55 168.55 ZT16-19 130.14999999999998 130.14999999999998 130.14999999999998 ZT20-23 223.8 223.8 223.8