condition mean min max ZT0-3 44.2494 44.2494 44.2494 ZT4-7 27.0708 27.0708 27.0708 ZT8-11 21.189549999999997 21.189549999999997 21.189549999999997 ZT12-15 14.982 14.982 14.982 ZT16-19 27.97025 27.97025 27.97025 ZT20-23 47.88165 47.88165 47.88165