condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.297954 0.297954 0.297954 ZT8-11 0.46954 0.46954 0.46954 ZT12-15 0.15546733333333332 0.0 0.31093466666666664 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0