condition mean min max ZT0-3 81.41243333333333 20.6672 140.1015 ZT4-7 45.9971 45.9971 45.9971 ZT8-11 18.7464 18.7464 18.7464 ZT12-15 59.759225 35.4349 84.08355 ZT16-19 56.570499999999996 56.570499999999996 56.570499999999996 ZT20-23 84.70904999999999 84.70904999999999 84.70904999999999