condition mean min max ZT0-3 33.5996275 21.855204999999998 45.34405 ZT4-7 0.628863 0.628863 0.628863 ZT8-11 8.555835 8.555835 8.555835 ZT12-15 0 0 0 ZT16-19 11.618459999999999 11.618459999999999 11.618459999999999 ZT20-23 3.7432550000000004 3.7432550000000004 3.7432550000000004