condition mean min max ZT0-3 3047.45 3047.45 3047.45 ZT4-7 3711.9 3711.9 3711.9 ZT8-11 3479.6 3479.6 3479.6 ZT12-15 3245.0 3245.0 3245.0 ZT16-19 3183.8999999999996 3183.8999999999996 3183.8999999999996 ZT20-23 3267.6499999999996 3267.6499999999996 3267.6499999999996