condition mean min max ZT0-3 0.33296349999999997 0.33296349999999997 0.33296349999999997 ZT4-7 0.21985300000000002 0.21985300000000002 0.21985300000000002 ZT8-11 0.20440550000000002 0.20440550000000002 0.20440550000000002 ZT12-15 0.349677 0.349677 0.349677 ZT16-19 0.3421635 0.3421635 0.3421635 ZT20-23 0.42461499999999996 0.42461499999999996 0.42461499999999996