condition mean min max ZT0-3 13.743649999999999 13.743649999999999 13.743649999999999 ZT4-7 11.2863 11.2863 11.2863 ZT8-11 10.850750000000001 10.850750000000001 10.850750000000001 ZT12-15 13.621500000000001 13.621500000000001 13.621500000000001 ZT16-19 16.48815 16.48815 16.48815 ZT20-23 14.471 14.471 14.471