condition mean min max ZT0-3 24.674251 24.674251 24.674251 ZT4-7 24.543341499999997 24.543341499999997 24.543341499999997 ZT8-11 23.378541499999997 23.378541499999997 23.378541499999997 ZT12-15 42.359981000000005 42.359981000000005 42.359981000000005 ZT16-19 31.775834 31.775834 31.775834 ZT20-23 56.073877 56.073877 56.073877