condition mean min max ZT0-3 25.49153683333333 0.0 76.0102 ZT4-7 19.98435 19.98435 19.98435 ZT8-11 1.7568025 1.7568025 1.7568025 ZT12-15 2.96468375 0.8057175000000001 5.12365 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0