1.某地80例北方成年女子肾上腺重量(g)测定结果如下:-|||-14.0 12.7 15.0 9.5 17.5 11.0 10.5 10.0 11.0 9.6-|||-12.0 17.0 14.0 11.0 11.5 11.4 19.0 8.0 15.0 12.0-|||-8.2 25.0 20.0 10.0 12.0 14.0 8.0 22.0 15.0 18.5-|||-19.0 15.0 8.4 15.0 12.5 16.0 9.0 10.0 14.0 9.9-|||-13.0 8.5 13.0 12.0 10.0 7.5 12.0 9.0 16.0 11.0-|||-12.0 17.2 8.0 7.9 7.5 13.0 11.1 9.0 10.0 8.5-|||-6.5 20.0 13.0 6.5 11.0 14.0 11.5 12.0 8.0 12.0-|||-14.0 12.0 13.0 10.5 14.5 10.5 10.0 19.0 11.5 12.5-|||-(1)编制频数分布表,简述其分布特征。