condition mean min max ZT0-3 8.77495 7.5351 10.0148 ZT4-7 27.4548 27.4548 27.4548 ZT8-11 67.91550000000001 67.91550000000001 67.91550000000001 ZT12-15 75.86037083333333 71.51936666666667 80.201375 ZT16-19 13.035364999999999 9.04383 17.026899999999998 ZT20-23 0 0 0