condition mean min max ZT0-3 211.04999999999998 211.04999999999998 211.04999999999998 ZT4-7 145.4 145.4 145.4 ZT8-11 144.25 144.25 144.25 ZT12-15 179.89999999999998 179.89999999999998 179.89999999999998 ZT16-19 223.6 223.6 223.6 ZT20-23 252.95 252.95 252.95