condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.02441 0.02441 0.02441 ZT8-11 0.0 0.0 0.0 ZT12-15 0.028717000000000003 0.028717000000000003 0.028717000000000003 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0