condition mean min max ZT0-3 0.10917066865888334 5.97665e-09 0.27336900000000003 ZT4-7 0.4218725 0.4218725 0.4218725 ZT8-11 0.585481045 0.585481045 0.585481045 ZT12-15 0.910945 0.74769 1.0742 ZT16-19 2.092145 2.092145 2.092145 ZT20-23 0.7618305 0.7618305 0.7618305