condition mean min max ZT0-3 0.033186433333333334 0.0 0.0747708 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0473798 0.0473798 0.0473798 ZT12-15 0.049479999999999996 0.0 0.09895999999999999 ZT16-19 0.066394 0.066394 0.066394 ZT20-23 0.0 0.0 0.0