condition mean min max ZT0-3 73.652866 73.652866 73.652866 ZT4-7 65.51225149999999 65.51225149999999 65.51225149999999 ZT8-11 66.7998045 66.7998045 66.7998045 ZT12-15 73.8221945 73.8221945 73.8221945 ZT16-19 83.856202 83.856202 83.856202 ZT20-23 75.863936 75.863936 75.863936