condition mean min max ZT0-3 161.4 161.4 161.4 ZT4-7 143.4 143.4 143.4 ZT8-11 187.1 187.1 187.1 ZT12-15 181.65 181.65 181.65 ZT16-19 172.85000000000002 172.85000000000002 172.85000000000002 ZT20-23 101.0 101.0 101.0