condition mean min max ZT0-3 0.06599925 0.0 0.1319985 ZT4-7 1.19093 1.19093 1.19093 ZT8-11 0.6631 0.6631 0.6631 ZT12-15 0 0 0 ZT16-19 0.1299195 0.1299195 0.1299195 ZT20-23 0.3914985 0.3914985 0.3914985