condition mean min max ZT0-3 47.826557 47.826557 47.826557 ZT4-7 44.363529 44.363529 44.363529 ZT8-11 39.91817399999999 39.91817399999999 39.91817399999999 ZT12-15 52.269969 52.269969 52.269969 ZT16-19 52.2812385 52.2812385 52.2812385 ZT20-23 59.806003000000004 59.806003000000004 59.806003000000004