condition mean min max ZT0-3 5.985712157 4.19765674 7.773767574 ZT4-7 4.669855413 3.44034474 5.899366085999999 ZT8-11 12.69582498525 8.8525725155 16.539077455 ZT12-15 11.671283924499999 10.553921468999999 12.78864638 ZT16-19 6.15778082175 5.930359663 6.3852019805 ZT20-23 6.69688948225 5.9785750239999995 7.4152039405