condition mean min max ZT0-3 1.524945 1.12382 1.92607 ZT4-7 1.0463505 1.0463505 1.0463505 ZT8-11 0.7837850000000001 0.7837850000000001 0.7837850000000001 ZT12-15 0 0 0 ZT16-19 1.208895 1.208895 1.208895 ZT20-23 1.037318 1.037318 1.037318