condition mean min max ZT0-3 1.9039000000000001 1.733315 2.074485 ZT4-7 1.461045 1.461045 1.461045 ZT8-11 0.6419630000000001 0.6419630000000001 0.6419630000000001 ZT12-15 0 0 0 ZT16-19 2.631625 2.631625 2.631625 ZT20-23 2.349225 2.349225 2.349225