condition mean min max ZT0-3 1.60186425 1.0305735 2.173155 ZT4-7 0.9056465 0.9056465 0.9056465 ZT8-11 1.3655315 1.3655315 1.3655315 ZT12-15 0 0 0 ZT16-19 1.473675 1.473675 1.473675 ZT20-23 2.07353 2.07353 2.07353