condition mean min max ZT0-3 42.80225 37.69475 47.90975 ZT4-7 26.676099999999998 26.676099999999998 26.676099999999998 ZT8-11 23.106299999999997 23.106299999999997 23.106299999999997 ZT12-15 0 0 0 ZT16-19 27.41885 27.41885 27.41885 ZT20-23 30.7285 30.7285 30.7285