condition mean min max ZT0-3 73.333409 73.333409 73.333409 ZT4-7 87.712598 87.712598 87.712598 ZT8-11 77.51248799999999 77.51248799999999 77.51248799999999 ZT12-15 69.362775 69.362775 69.362775 ZT16-19 57.697552 57.697552 57.697552 ZT20-23 69.089516 69.089516 69.089516