condition mean min max ZT0-3 65.26262510250001 64.38058485 66.144665355 ZT4-7 64.86313472166667 56.55614735666666 73.17012208666667 ZT8-11 63.508416585 61.38248910333333 65.63434406666667 ZT12-15 68.918093795 68.33647438 69.49971321 ZT16-19 66.09800729 65.96558247 66.23043211 ZT20-23 74.45427491833334 69.98110596000001 78.92744387666667