condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 2.3699240716666665 0.0 4.739848143333333 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0 0.0 0.0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0