condition mean min max ZT0-3 0.28405200124999996 0.269791772 0.2983122305 ZT4-7 0.97876968975 0.8613492869999999 1.0961900925 ZT8-11 1.2739869174999998 1.0821671684999998 1.4658066664999998 ZT12-15 33.628562476 33.551034732000005 33.70609022 ZT16-19 32.815185185000004 26.926316325000002 38.704054045 ZT20-23 14.712374042999999 12.237952500999999 17.186795585