condition mean min max ZT0-3 9.690626 9.690626 9.690626 ZT4-7 12.838011 12.838011 12.838011 ZT8-11 11.406933 11.406933 11.406933 ZT12-15 12.0459645 12.0459645 12.0459645 ZT16-19 12.1107265 12.1107265 12.1107265 ZT20-23 10.902061 10.902061 10.902061