condition mean min max ZT0-3 0.5915586666666667 0.0 1.449765 ZT4-7 0.0 0.0 0.0 ZT8-11 0.4675405 0.4675405 0.4675405 ZT12-15 0.734091 0.454692 1.01349 ZT16-19 0.1505275 0.1505275 0.1505275 ZT20-23 0.0 0.0 0.0