condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.04155895 0.04155895 0.04155895 ZT8-11 0.0 0.0 0.0 ZT12-15 0 0 0 ZT16-19 0.04005805 0.04005805 0.04005805 ZT20-23 0.08067875 0.08067875 0.08067875