condition mean min max ZT0-3 0.6891005 0.6562915 0.7219095 ZT4-7 1.472045 1.472045 1.472045 ZT8-11 0.9270160000000001 0.9270160000000001 0.9270160000000001 ZT12-15 0 0 0 ZT16-19 1.5180500000000001 1.5180500000000001 1.5180500000000001 ZT20-23 1.1819644999999999 1.1819644999999999 1.1819644999999999