condition mean min max ZT0-3 5.9047625 5.140625 6.668900000000001 ZT4-7 4.871885 4.871885 4.871885 ZT8-11 4.577285 4.577285 4.577285 ZT12-15 0 0 0 ZT16-19 5.5865100000000005 5.5865100000000005 5.5865100000000005 ZT20-23 6.3369 6.3369 6.3369