condition mean min max ZT0-3 13.675999999999998 13.675999999999998 13.675999999999998 ZT4-7 11.1411 11.1411 11.1411 ZT8-11 10.3656 10.3656 10.3656 ZT12-15 9.992885 9.992885 9.992885 ZT16-19 11.8975 11.8975 11.8975 ZT20-23 11.779399999999999 11.779399999999999 11.779399999999999