condition mean min max ZT0-3 0.3231925 0.3231925 0.3231925 ZT4-7 0.379589 0.379589 0.379589 ZT8-11 0.3161295 0.3161295 0.3161295 ZT12-15 0.5018655000000001 0.5018655000000001 0.5018655000000001 ZT16-19 0.5393950000000001 0.5393950000000001 0.5393950000000001 ZT20-23 0.6265205 0.6265205 0.6265205