condition mean min max ZT0-3 2848.3 2848.3 2848.3 ZT4-7 3121.5 3121.5 3121.5 ZT8-11 2475.6499999999996 2475.6499999999996 2475.6499999999996 ZT12-15 1586.6 1586.6 1586.6 ZT16-19 1373.15 1373.15 1373.15 ZT20-23 1685.6 1685.6 1685.6