condition mean min max ZT0-3 60.207388 60.207388 60.207388 ZT4-7 30.696424999999998 30.696424999999998 30.696424999999998 ZT8-11 32.823137 32.823137 32.823137 ZT12-15 51.0944445 51.0944445 51.0944445 ZT16-19 64.8758655 64.8758655 64.8758655 ZT20-23 78.17235099999999 78.17235099999999 78.17235099999999