condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0397607 0.0397607 0.0397607 ZT8-11 0.1158195 0.1158195 0.1158195 ZT12-15 0 0 0 ZT16-19 0.15375325 0.15375325 0.15375325 ZT20-23 0.0 0.0 0.0