condition mean min max ZT0-3 224.8 224.8 224.8 ZT4-7 205.9 205.9 205.9 ZT8-11 227.8 227.8 227.8 ZT12-15 203.0 203.0 203.0 ZT16-19 181.79999999999998 181.79999999999998 181.79999999999998 ZT20-23 160.2 160.2 160.2