condition mean min max ZT0-3 37.8784 37.87235 37.88445 ZT4-7 54.89165 54.89165 54.89165 ZT8-11 52.45255 52.45255 52.45255 ZT12-15 0 0 0 ZT16-19 50.23755 50.23755 50.23755 ZT20-23 48.48945 48.48945 48.48945