An Elementary Manual of Statistics (Classic Reprint)
Excerpt from An Elementary Manual of Statistics 1. Statistics are numerical statements of facts in any department of inquiry, placed in relation to each other
statistical methods are devices for abbreviating and classifying the statements and making clear the relations. The elementary methods are based on arithmetical processes of an easy but specialized kind
more refined methods, necessary for certain classes of investigation, involve complex mathematical ideas. 2. Statistical treatment is necessary in a very great variety of cases, some of which may be distinguished as follows- Groups. - If a large number of things or persons have something in common, e. g. as members of the same nation, workers in the same occupation, houses in a defined locality, but differ one from the other in respect to some measurable characteristic, e. g. age, amount of wages, rateable value, together they form a statistical group. Groups can be represented by diagrams, tabulated in..