condition mean min max ZT0-3 134.717153 134.717153 134.717153 ZT4-7 108.462827 108.462827 108.462827 ZT8-11 113.287485 113.287485 113.287485 ZT12-15 104.6854585 104.6854585 104.6854585 ZT16-19 148.3535055 148.3535055 148.3535055 ZT20-23 182.934487 182.934487 182.934487