condition mean min max ZT0-3 4.395759999999999 3.8459399999999997 4.94558 ZT4-7 1.409205 1.409205 1.409205 ZT8-11 0.0 0.0 0.0 ZT12-15 0 0 0 ZT16-19 0.34727399999999997 0.34727399999999997 0.34727399999999997 ZT20-23 1.22085 1.22085 1.22085