condition mean min max ZT0-3 0.27334925 0.2388515 0.307847 ZT4-7 0.1427959 0.1427959 0.1427959 ZT8-11 0.23959350000000001 0.23959350000000001 0.23959350000000001 ZT12-15 0 0 0 ZT16-19 0.49337949999999997 0.49337949999999997 0.49337949999999997 ZT20-23 0.4251855 0.4251855 0.4251855