condition mean min max ZT0-3 1688.35 1688.35 1688.35 ZT4-7 3628.4 3628.4 3628.4 ZT8-11 3217.5 3217.5 3217.5 ZT12-15 3346.7 3346.7 3346.7 ZT16-19 2675.8 2675.8 2675.8 ZT20-23 1938.1999999999998 1938.1999999999998 1938.1999999999998