condition mean min max ZT0-3 568.616672 568.616672 568.616672 ZT4-7 449.2621905 449.2621905 449.2621905 ZT8-11 179.5795865 179.5795865 179.5795865 ZT12-15 132.498036 132.498036 132.498036 ZT16-19 30.379445 30.379445 30.379445 ZT20-23 31.2297215 31.2297215 31.2297215