condition mean min max ZT0-3 2.7619525 2.677195 2.84671 ZT4-7 1.8779850000000002 1.8779850000000002 1.8779850000000002 ZT8-11 0.8941095 0.8941095 0.8941095 ZT12-15 0 0 0 ZT16-19 1.545085 1.545085 1.545085 ZT20-23 3.149405 3.149405 3.149405