condition mean min max ZT0-3 69.193075 65.9006 72.48555 ZT4-7 58.33735 58.33735 58.33735 ZT8-11 35.6951 35.6951 35.6951 ZT12-15 0 0 0 ZT16-19 56.45255 56.45255 56.45255 ZT20-23 71.09254999999999 71.09254999999999 71.09254999999999