condition mean min max ZT0-3 0.655025806 0.586548567 0.723503045 ZT4-7 1.10515950575 0.8057656435 1.404553368 ZT8-11 1.73175130325 1.3760980845000002 2.087404522 ZT12-15 2.82481624425 2.2928047195 3.356827769 ZT16-19 1.89127858475 1.7715851850000002 2.0109719845 ZT20-23 3.3808269202499996 2.7691167619999995 3.9925370785