condition mean min max ZT0-3 1.428115 1.3602349999999999 1.4959950000000002 ZT4-7 0.234284 0.234284 0.234284 ZT8-11 0.0 0.0 0.0 ZT12-15 0 0 0 ZT16-19 1.2438105 1.2438105 1.2438105 ZT20-23 0.7954545 0.7954545 0.7954545