condition mean min max ZT0-3 1.0588365 1.0588365 1.0588365 ZT4-7 0.411693 0.411693 0.411693 ZT8-11 1.3339 1.3339 1.3339 ZT12-15 4.38073 4.38073 4.38073 ZT16-19 2.26802 2.26802 2.26802 ZT20-23 1.30035 1.30035 1.30035