condition mean min max ZT0-3 6.2292475000000005 5.719485000000001 6.73901 ZT4-7 6.2676549999999995 6.2676549999999995 6.2676549999999995 ZT8-11 9.15433 9.15433 9.15433 ZT12-15 0 0 0 ZT16-19 9.01853 9.01853 9.01853 ZT20-23 7.042165000000001 7.042165000000001 7.042165000000001