condition mean min max ZT0-3 0.53879625 0.2723595 0.805233 ZT4-7 0.2842965 0.2842965 0.2842965 ZT8-11 0.2666505 0.2666505 0.2666505 ZT12-15 0 0 0 ZT16-19 0.7846075 0.7846075 0.7846075 ZT20-23 0.7399425 0.7399425 0.7399425