condition mean min max ZT0-3 3.2761125 2.846105 3.7061200000000003 ZT4-7 4.54282 4.54282 4.54282 ZT8-11 5.03811 5.03811 5.03811 ZT12-15 0 0 0 ZT16-19 5.27588 5.27588 5.27588 ZT20-23 3.600285 3.600285 3.600285