condition mean min max ZT0-3 1.35673 1.051145 1.662315 ZT4-7 0.979725 0.979725 0.979725 ZT8-11 0.8090094999999999 0.8090094999999999 0.8090094999999999 ZT12-15 0 0 0 ZT16-19 1.299005 1.299005 1.299005 ZT20-23 1.0548735 1.0548735 1.0548735