condition mean min max ZT0-3 82.257674 82.257674 82.257674 ZT4-7 38.349014499999996 38.349014499999996 38.349014499999996 ZT8-11 45.0022595 45.0022595 45.0022595 ZT12-15 51.053105 51.053105 51.053105 ZT16-19 35.5371365 35.5371365 35.5371365 ZT20-23 26.441506500000003 26.441506500000003 26.441506500000003