condition mean min max ZT0-3 139.9 139.9 139.9 ZT4-7 123.1 123.1 123.1 ZT8-11 127.6 127.6 127.6 ZT12-15 193.8 193.8 193.8 ZT16-19 172.60000000000002 172.60000000000002 172.60000000000002 ZT20-23 134.75 134.75 134.75