condition mean min max ZT0-3 73.2 73.2 73.2 ZT4-7 168.7 168.7 168.7 ZT8-11 181.25 181.25 181.25 ZT12-15 163.39999999999998 163.39999999999998 163.39999999999998 ZT16-19 133.85 133.85 133.85 ZT20-23 64.5 64.5 64.5