condition mean min max ZT0-3 779.7 779.7 779.7 ZT4-7 1075.0 1075.0 1075.0 ZT8-11 1127.4 1127.4 1127.4 ZT12-15 892.0 892.0 892.0 ZT16-19 815.95 815.95 815.95 ZT20-23 980.45 980.45 980.45