condition mean min max ZT0-3 37.75812500000001 33.833600000000004 41.68265 ZT4-7 33.68345 33.68345 33.68345 ZT8-11 28.731650000000002 28.731650000000002 28.731650000000002 ZT12-15 0 0 0 ZT16-19 33.73635 33.73635 33.73635 ZT20-23 41.6383 41.6383 41.6383