condition mean min max ZT0-3 19.045454 19.045454 19.045454 ZT4-7 15.670578500000001 15.670578500000001 15.670578500000001 ZT8-11 18.4795795 18.4795795 18.4795795 ZT12-15 122.9495905 122.9495905 122.9495905 ZT16-19 30.4566345 30.4566345 30.4566345 ZT20-23 82.264241 82.264241 82.264241