condition mean min max ZT0-3 0.53328825 0.5281475 0.538429 ZT4-7 2.147545 2.147545 2.147545 ZT8-11 1.8197455 1.8197455 1.8197455 ZT12-15 0 0 0 ZT16-19 1.588355 1.588355 1.588355 ZT20-23 0.8508335 0.8508335 0.8508335