condition mean min max ZT0-3 29.928224999999998 25.05855 34.7979 ZT4-7 33.22155 33.22155 33.22155 ZT8-11 10.984850000000002 10.984850000000002 10.984850000000002 ZT12-15 0 0 0 ZT16-19 7.9202650000000006 7.9202650000000006 7.9202650000000006 ZT20-23 13.2225 13.2225 13.2225