condition mean min max ZT0-3 22.012324999999997 13.2756 30.749049999999997 ZT4-7 42.5702 42.5702 42.5702 ZT8-11 26.368900000000004 26.368900000000004 26.368900000000004 ZT12-15 0 0 0 ZT16-19 44.100300000000004 44.100300000000004 44.100300000000004 ZT20-23 41.219300000000004 41.219300000000004 41.219300000000004