condition mean min max ZT0-3 0.0237263 0.01555345 0.03189915 ZT4-7 0.0476173 0.0476173 0.0476173 ZT8-11 0.01575155 0.01575155 0.01575155 ZT12-15 0 0 0 ZT16-19 0.0156366 0.0156366 0.0156366 ZT20-23 0.0 0.0 0.0