condition mean min max ZT0-3 661.0999999999999 661.0999999999999 661.0999999999999 ZT4-7 694.0 694.0 694.0 ZT8-11 456.1 456.1 456.1 ZT12-15 451.15 451.15 451.15 ZT16-19 464.65 464.65 464.65 ZT20-23 620.95 620.95 620.95