condition mean min max ZT0-3 2279.8 2279.8 2279.8 ZT4-7 3055.4 3055.4 3055.4 ZT8-11 2848.55 2848.55 2848.55 ZT12-15 2590.95 2590.95 2590.95 ZT16-19 2493.8500000000004 2493.8500000000004 2493.8500000000004 ZT20-23 2284.7 2284.7 2284.7