condition mean min max ZT0-3 58.117515 58.117515 58.117515 ZT4-7 64.60306800000001 64.60306800000001 64.60306800000001 ZT8-11 71.24411549999999 71.24411549999999 71.24411549999999 ZT12-15 67.4558275 67.4558275 67.4558275 ZT16-19 86.038628 86.038628 86.038628 ZT20-23 85.51370349999999 85.51370349999999 85.51370349999999