condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.02736475 0.0 0.0547295 ZT16-19 0.04877165 0.04877165 0.04877165 ZT20-23 0.0 0.0 0.0