condition mean min max ZT0-3 41.520399999999995 41.11325 41.92755 ZT4-7 37.607299999999995 37.607299999999995 37.607299999999995 ZT8-11 85.14495 85.14495 85.14495 ZT12-15 0 0 0 ZT16-19 88.4494 88.4494 88.4494 ZT20-23 53.8445 53.8445 53.8445