condition mean min max ZT0-3 0.50659775 0.1431685 0.870027 ZT4-7 0.58356 0.58356 0.58356 ZT8-11 0.7250015 0.7250015 0.7250015 ZT12-15 0 0 0 ZT16-19 0.7134325 0.7134325 0.7134325 ZT20-23 0.663105 0.663105 0.663105