condition mean min max ZT0-3 11.422443836749999 3.0994529034999996 19.74543477 ZT4-7 0.792285865 0.5412192785 1.0433524514999999 ZT8-11 4.8800381405 3.3434351735 6.4166411075 ZT12-15 4.25726011675 3.3220568745000003 5.192463359 ZT16-19 2.94837975275 2.8847385675000004 3.012020938 ZT20-23 2.6416526192500003 2.42092201 2.8623832285