condition mean min max ZT0-3 0.6295120000000001 0.6295120000000001 0.6295120000000001 ZT4-7 0.840984 0.840984 0.840984 ZT8-11 0.7372810000000001 0.7372810000000001 0.7372810000000001 ZT12-15 0.6738900000000001 0.6738900000000001 0.6738900000000001 ZT16-19 1.17015 1.17015 1.17015 ZT20-23 0.8181795000000001 0.8181795000000001 0.8181795000000001