condition mean min max ZT0-3 53.90945 53.88885 53.93005 ZT4-7 47.68775 47.68775 47.68775 ZT8-11 13.2177 13.2177 13.2177 ZT12-15 0 0 0 ZT16-19 23.124200000000002 23.124200000000002 23.124200000000002 ZT20-23 44.7021 44.7021 44.7021