condition mean min max ZT0-3 1999.1999999999998 1999.1999999999998 1999.1999999999998 ZT4-7 2923.5 2923.5 2923.5 ZT8-11 3069.0 3069.0 3069.0 ZT12-15 5901.3 5901.3 5901.3 ZT16-19 5076.25 5076.25 5076.25 ZT20-23 2403.8 2403.8 2403.8