condition mean min max ZT0-3 208.2 208.2 208.2 ZT4-7 234.6 234.6 234.6 ZT8-11 220.10000000000002 220.10000000000002 220.10000000000002 ZT12-15 249.9 249.9 249.9 ZT16-19 219.6 219.6 219.6 ZT20-23 204.3 204.3 204.3