condition mean min max ZT0-3 0.07630966299999999 0.011394211999999999 0.14122511399999998 ZT4-7 0.49266550400000003 0.24496138399999998 0.7403696240000001 ZT8-11 2.0874894245 1.4797605390000002 2.69521831 ZT12-15 4.31389586375 2.8602822110000004 5.7675095165000005 ZT16-19 1.48917347775 1.407762007 1.5705849485 ZT20-23 1.9915318167500002 1.9763849880000002 2.0066786455