condition mean min max ZT0-3 56.41035 49.13865 62.66635 ZT4-7 45.5071 45.5071 45.5071 ZT8-11 47.411699999999996 47.411699999999996 47.411699999999996 ZT12-15 48.830775 40.06825 57.5933 ZT16-19 43.92105 43.92105 43.92105 ZT20-23 63.28660000000001 63.28660000000001 63.28660000000001