condition mean min max ZT0-3 0.1956875 0.0665745 0.3248005 ZT4-7 0.458048 0.458048 0.458048 ZT8-11 0.592045 0.592045 0.592045 ZT12-15 0 0 0 ZT16-19 0.518687 0.518687 0.518687 ZT20-23 0.26296949999999997 0.26296949999999997 0.26296949999999997