condition mean min max ZT0-3 0.3649535 0.187181 0.5435785 ZT4-7 0.17667 0.17667 0.17667 ZT8-11 0.896813 0.896813 0.896813 ZT12-15 0.46081574999999997 0.361186 0.5604454999999999 ZT16-19 0.9381010000000001 0.9381010000000001 0.9381010000000001 ZT20-23 0.0942995 0.0942995 0.0942995