condition mean min max ZT0-3 35.175977 35.175977 35.175977 ZT4-7 33.4800975 33.4800975 33.4800975 ZT8-11 46.046746 46.046746 46.046746 ZT12-15 24.819809 24.819809 24.819809 ZT16-19 27.999305999999997 27.999305999999997 27.999305999999997 ZT20-23 28.799801 28.799801 28.799801