condition mean min max ZT0-3 75.001484 75.001484 75.001484 ZT4-7 57.9606735 57.9606735 57.9606735 ZT8-11 37.506067 37.506067 37.506067 ZT12-15 26.294539 26.294539 26.294539 ZT16-19 36.4378085 36.4378085 36.4378085 ZT20-23 40.4519105 40.4519105 40.4519105