condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 0.164843322 0.0 0.329686644 ZT12-15 0.0 0.0 0.0 ZT16-19 0.02741089216666667 0.0 0.05482178433333334 ZT20-23 0.0 0.0 0.0