condition mean min max ZT0-3 2.19789 1.9397 2.45608 ZT4-7 1.96848 1.96848 1.96848 ZT8-11 4.436755 4.436755 4.436755 ZT12-15 0 0 0 ZT16-19 5.14992 5.14992 5.14992 ZT20-23 5.18449 5.18449 5.18449