condition mean min max ZT0-3 5.54078 5.54078 5.54078 ZT4-7 2.49371 2.49371 2.49371 ZT8-11 5.5878 5.5878 5.5878 ZT12-15 4.92667 4.92667 4.92667 ZT16-19 10.095085000000001 10.095085000000001 10.095085000000001 ZT20-23 7.188035 7.188035 7.188035