condition mean min max ZT0-3 0.23323366666666667 0.0 0.4651485 ZT4-7 0.0 0.0 0.0 ZT8-11 0.2241575 0.2241575 0.2241575 ZT12-15 0.35811950000000004 0.0 0.7162390000000001 ZT16-19 0.0 0.0 0.0 ZT20-23 0.4901275 0.4901275 0.4901275