condition mean min max ZT0-3 3.835025 3.835025 3.835025 ZT4-7 3.598515 3.598515 3.598515 ZT8-11 5.694240000000001 5.694240000000001 5.694240000000001 ZT12-15 16.3134 16.3134 16.3134 ZT16-19 13.22255 13.22255 13.22255 ZT20-23 6.58711 6.58711 6.58711