condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 5.170545 5.170545 5.170545 ZT8-11 2.10273 2.10273 2.10273 ZT12-15 5.97455 5.97455 5.97455 ZT16-19 13.50029 13.50029 13.50029 ZT20-23 7.83434 7.83434 7.83434