condition mean min max ZT0-3 14.71195 14.71195 14.71195 ZT4-7 4.77211 4.77211 4.77211 ZT8-11 8.831900000000001 8.831900000000001 8.831900000000001 ZT12-15 13.818349999999999 13.818349999999999 13.818349999999999 ZT16-19 26.19735 26.19735 26.19735 ZT20-23 24.101300000000002 24.101300000000002 24.101300000000002