condition mean min max ZT0-3 0.037514483333333334 0.0 0.08438525 ZT4-7 0.0268865 0.0268865 0.0268865 ZT8-11 0.08506140000000001 0.08506140000000001 0.08506140000000001 ZT12-15 0.08683332499999999 0.02754815 0.14611849999999998 ZT16-19 0.0547195 0.0547195 0.0547195 ZT20-23 0.030851 0.030851 0.030851