condition mean min max ZT0-3 93.164228 93.164228 93.164228 ZT4-7 101.957067 101.957067 101.957067 ZT8-11 117.9039875 117.9039875 117.9039875 ZT12-15 111.1800995 111.1800995 111.1800995 ZT16-19 112.04296450000001 112.04296450000001 112.04296450000001 ZT20-23 122.20856799999999 122.20856799999999 122.20856799999999