condition mean min max ZT0-3 12.40606 8.31513 15.26805 ZT4-7 11.643699999999999 11.643699999999999 11.643699999999999 ZT8-11 10.756575 10.756575 10.756575 ZT12-15 13.518825 12.62435 14.4133 ZT16-19 14.4429 14.4429 14.4429 ZT20-23 18.220399999999998 18.220399999999998 18.220399999999998