condition mean min max ZT0-3 83.194789 83.194789 83.194789 ZT4-7 57.627202 57.627202 57.627202 ZT8-11 40.0679115 40.0679115 40.0679115 ZT12-15 55.172793 55.172793 55.172793 ZT16-19 37.185279 37.185279 37.185279 ZT20-23 36.789143499999994 36.789143499999994 36.789143499999994