condition mean min max ZT0-3 120.60000000000001 120.60000000000001 120.60000000000001 ZT4-7 84.6 84.6 84.6 ZT8-11 63.55 63.55 63.55 ZT12-15 111.9 111.9 111.9 ZT16-19 127.1 127.1 127.1 ZT20-23 130.15 130.15 130.15