condition mean min max ZT0-3 579.1097500000001 522.951 635.2685 ZT4-7 515.7415000000001 515.7415000000001 515.7415000000001 ZT8-11 492.57 492.57 492.57 ZT12-15 0 0 0 ZT16-19 902.5540000000001 902.5540000000001 902.5540000000001 ZT20-23 589.8015 589.8015 589.8015