condition mean min max ZT0-3 66.3192 53.472 79.1664 ZT4-7 41.975449999999995 41.975449999999995 41.975449999999995 ZT8-11 33.6232 33.6232 33.6232 ZT12-15 0 0 0 ZT16-19 47.8463 47.8463 47.8463 ZT20-23 41.0415 41.0415 41.0415