condition mean min max ZT0-3 240.5555 240.5555 240.5555 ZT4-7 122.59100000000001 122.59100000000001 122.59100000000001 ZT8-11 181.48950000000002 181.48950000000002 181.48950000000002 ZT12-15 223.525 223.525 223.525 ZT16-19 308.1975 308.1975 308.1975 ZT20-23 241.78300000000002 241.78300000000002 241.78300000000002