condition mean min max ZT0-3 25.679933333333334 25.19115 26.6423 ZT4-7 24.3781 24.3781 24.3781 ZT8-11 32.22665 32.22665 32.22665 ZT12-15 35.012725 33.511700000000005 36.51375 ZT16-19 28.2635 28.2635 28.2635 ZT20-23 23.14265 23.14265 23.14265