condition mean min max ZT0-3 2689.05 2689.05 2689.05 ZT4-7 3573.9 3573.9 3573.9 ZT8-11 3277.95 3277.95 3277.95 ZT12-15 3171.7 3171.7 3171.7 ZT16-19 3051.7 3051.7 3051.7 ZT20-23 2909.3 2909.3 2909.3