condition mean min max ZT0-3 0.09459475 0.0 0.1891895 ZT4-7 0.0 0.0 0.0 ZT8-11 0.064751 0.064751 0.064751 ZT12-15 0 0 0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.12582349999999998 0.12582349999999998 0.12582349999999998