condition mean min max ZT0-3 23.102211666666665 10.968935 29.49355 ZT4-7 8.37985 8.37985 8.37985 ZT8-11 7.40977 7.40977 7.40977 ZT12-15 13.7484 10.13655 17.36025 ZT16-19 19.497349999999997 19.497349999999997 19.497349999999997 ZT20-23 31.586399999999998 31.586399999999998 31.586399999999998