condition mean min max ZT0-3 0.631179 0.5079670000000001 0.754391 ZT4-7 2.388302 2.388302 2.388302 ZT8-11 1.2619645 1.2619645 1.2619645 ZT12-15 0 0 0 ZT16-19 0.1250475 0.1250475 0.1250475 ZT20-23 0.5027739999999999 0.5027739999999999 0.5027739999999999