condition mean min max ZT0-3 2672.7 2672.7 2672.7 ZT4-7 2897.0 2897.0 2897.0 ZT8-11 3099.55 3099.55 3099.55 ZT12-15 2536.6000000000004 2536.6000000000004 2536.6000000000004 ZT16-19 2457.8 2457.8 2457.8 ZT20-23 2709.85 2709.85 2709.85