condition mean min max ZT0-3 6142.1 6142.1 6142.1 ZT4-7 2210.8 2210.8 2210.8 ZT8-11 1403.8999999999999 1403.8999999999999 1403.8999999999999 ZT12-15 440.1 440.1 440.1 ZT16-19 856.25 856.25 856.25 ZT20-23 3453.6 3453.6 3453.6