condition mean min max ZT0-3 16.879672 16.879672 16.879672 ZT4-7 18.252794 18.252794 18.252794 ZT8-11 13.302589000000001 13.302589000000001 13.302589000000001 ZT12-15 14.214607 14.214607 14.214607 ZT16-19 12.279345 12.279345 12.279345 ZT20-23 11.613105999999998 11.613105999999998 11.613105999999998