condition mean min max ZT0-3 0.061918575000000003 0.04192465 0.0819125 ZT4-7 0.0427181 0.0427181 0.0427181 ZT8-11 0.124434 0.124434 0.124434 ZT12-15 0 0 0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.04192125 0.04192125 0.04192125