condition mean min max ZT0-3 5.24095 4.19788 6.28402 ZT4-7 3.29848 3.29848 3.29848 ZT8-11 3.18216 3.18216 3.18216 ZT12-15 0 0 0 ZT16-19 5.966425 5.966425 5.966425 ZT20-23 4.625065 4.625065 4.625065