condition mean min max ZT0-3 0.068903675 0.0 0.13780735 ZT4-7 0.0452632 0.0452632 0.0452632 ZT8-11 0.13888335000000002 0.13888335000000002 0.13888335000000002 ZT12-15 0 0 0 ZT16-19 0.225796 0.225796 0.225796 ZT20-23 0.27166565 0.27166565 0.27166565