condition mean min max ZT0-3 80.39033333333333 65.3832 89.50880000000001 ZT4-7 67.02575 67.02575 67.02575 ZT8-11 39.6814 39.6814 39.6814 ZT12-15 25.655175 25.26895 26.0414 ZT16-19 33.785399999999996 33.785399999999996 33.785399999999996 ZT20-23 62.07695 62.07695 62.07695