condition mean min max ZT0-3 2453.2 2453.2 2453.2 ZT4-7 1480.4 1480.4 1480.4 ZT8-11 1125.1999999999998 1125.1999999999998 1125.1999999999998 ZT12-15 1204.1 1204.1 1204.1 ZT16-19 1463.4 1463.4 1463.4 ZT20-23 1867.4 1867.4 1867.4