condition mean min max ZT0-3 33.5205910725 29.627750495 37.41343165 ZT4-7 28.7865057325 24.43954272 33.133468745 ZT8-11 36.5000979875 33.841616595 39.15857938 ZT12-15 34.2090534525 31.20340865 37.214698255 ZT16-19 37.70374419 35.805029715 39.602458665 ZT20-23 49.0588207 46.878641529999996 51.23899987