condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.440475 0.440475 0.440475 ZT8-11 0.4557355 0.4557355 0.4557355 ZT12-15 0.11357875 0.0 0.2271575 ZT16-19 0.22009 0.22009 0.22009 ZT20-23 0.0 0.0 0.0