condition mean min max ZT0-3 1.633265 1.633265 1.633265 ZT4-7 1.03904 1.03904 1.03904 ZT8-11 0.0 0.0 0.0 ZT12-15 2.056275 2.056275 2.056275 ZT16-19 2.7349 2.7349 2.7349 ZT20-23 1.79341 1.79341 1.79341