condition mean min max ZT0-3 11.4161 8.4426 13.4479 ZT4-7 14.5175 14.5175 14.5175 ZT8-11 44.59035 44.59035 44.59035 ZT12-15 7.7849825 7.38727 8.182694999999999 ZT16-19 9.41587 9.41587 9.41587 ZT20-23 12.770299999999999 12.770299999999999 12.770299999999999