condition mean min max ZT0-3 4823.85 4823.85 4823.85 ZT4-7 6228.7 6228.7 6228.7 ZT8-11 6146.799999999999 6146.799999999999 6146.799999999999 ZT12-15 5645.450000000001 5645.450000000001 5645.450000000001 ZT16-19 5272.299999999999 5272.299999999999 5272.299999999999 ZT20-23 5025.05 5025.05 5025.05