condition mean min max ZT0-3 0.113966387 0.0 0.227932774 ZT4-7 0.1375152105 0.0 0.275030421 ZT8-11 0.2697320785 0.2594296705 0.2800344865 ZT12-15 0.71998640775 0.48958842999999996 0.9503843855 ZT16-19 1.0855686795 0.8502225739999999 1.320914785 ZT20-23 0.8716506645 0.835249244 0.908052085