condition mean min max ZT0-3 3192.7 3192.7 3192.7 ZT4-7 3555.9 3555.9 3555.9 ZT8-11 3158.45 3158.45 3158.45 ZT12-15 3129.5 3129.5 3129.5 ZT16-19 3311.6499999999996 3311.6499999999996 3311.6499999999996 ZT20-23 3105.1 3105.1 3105.1