condition mean min max ZT0-3 1.0689440000000001 0.897968 1.2399200000000001 ZT4-7 0.243973 0.243973 0.243973 ZT8-11 0.12222369999999999 0.12222369999999999 0.12222369999999999 ZT12-15 0 0 0 ZT16-19 0.240823 0.240823 0.240823 ZT20-23 0.4837345 0.4837345 0.4837345