condition mean min max ZT0-3 4.34801 4.144345 4.551675 ZT4-7 3.905465 3.905465 3.905465 ZT8-11 4.55258 4.55258 4.55258 ZT12-15 0 0 0 ZT16-19 5.440812 5.440812 5.440812 ZT20-23 4.823259999999999 4.823259999999999 4.823259999999999