condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 0.02639525 0.02639525 0.02639525 ZT12-15 0.055166175 0.02631295 0.0840194 ZT16-19 0.0509885 0.0509885 0.0509885 ZT20-23 0.0277229 0.0277229 0.0277229