condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0288269 0.0288269 0.0288269 ZT8-11 0.0293445 0.0293445 0.0293445 ZT12-15 0.0 0.0 0.0 ZT16-19 0.0123807 0.0 0.0247614 ZT20-23 0 0 0