condition mean min max ZT0-3 0.26813000000000003 0.0 0.80439 ZT4-7 0.0 0.0 0.0 ZT8-11 0.3187235 0.3187235 0.3187235 ZT12-15 0.247424 0.0 0.494848 ZT16-19 0.373509 0.373509 0.373509 ZT20-23 0.0 0.0 0.0