condition mean min max ZT0-3 7137.9 7137.9 7137.9 ZT4-7 9277.1 9277.1 9277.1 ZT8-11 8616.45 8616.45 8616.45 ZT12-15 5965.450000000001 5965.450000000001 5965.450000000001 ZT16-19 2788.0 2788.0 2788.0 ZT20-23 3495.1 3495.1 3495.1