condition mean min max ZT0-3 0.1255367 0.0422614 0.208812 ZT4-7 0.166373 0.166373 0.166373 ZT8-11 0.42098599999999997 0.42098599999999997 0.42098599999999997 ZT12-15 0 0 0 ZT16-19 0.08302804999999999 0.08302804999999999 0.08302804999999999 ZT20-23 0.2922375 0.2922375 0.2922375