condition mean min max ZT0-3 0.8190625 0.8190625 0.8190625 ZT4-7 0.45374 0.45374 0.45374 ZT8-11 0.6639145 0.6639145 0.6639145 ZT12-15 0.523482 0.523482 0.523482 ZT16-19 0.9502835 0.9502835 0.9502835 ZT20-23 1.137368 1.137368 1.137368