condition mean min max ZT0-3 96.784681 96.784681 96.784681 ZT4-7 55.779115000000004 55.779115000000004 55.779115000000004 ZT8-11 80.52285599999999 80.52285599999999 80.52285599999999 ZT12-15 98.0508735 98.0508735 98.0508735 ZT16-19 113.42436649999999 113.42436649999999 113.42436649999999 ZT20-23 178.993772 178.993772 178.993772