condition mean min max ZT0-3 1.4905857500000002 1.27082 1.7103515 ZT4-7 1.782429 1.782429 1.782429 ZT8-11 3.11877 3.11877 3.11877 ZT12-15 0 0 0 ZT16-19 4.3739550000000005 4.3739550000000005 4.3739550000000005 ZT20-23 3.456905 3.456905 3.456905