condition mean min max ZT0-3 13.661950000000001 13.5642 13.7597 ZT4-7 22.759749999999997 22.759749999999997 22.759749999999997 ZT8-11 22.18415 22.18415 22.18415 ZT12-15 0 0 0 ZT16-19 25.2265 25.2265 25.2265 ZT20-23 21.8858 21.8858 21.8858