condition mean min max ZT0-3 5.3170525 4.838425 5.79568 ZT4-7 4.338620000000001 4.338620000000001 4.338620000000001 ZT8-11 3.314495 3.314495 3.314495 ZT12-15 0 0 0 ZT16-19 4.378755 4.378755 4.378755 ZT20-23 4.110115 4.110115 4.110115