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 0.07092525 0.0 0.1418505 ZT16-19 0.19942549999999998 0.19942549999999998 0.19942549999999998 ZT20-23 0.066546 0.066546 0.066546