Elementary statistics Wiley series in probability and mathematical statistics

Elementary statistics Wiley series in probability and mathematical statistics pdf epub mobi txt 电子书 下载 2025

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From a very general point of view, statistical methods are methods for treating

numerical data. Thus, methods for collecting and analyzing the data of any

business or government enterprise may be considered as belonging to the field

of statistics. Such a definition, however, is much too broad in scope to be useful.

It is necessary to restrict both the nature of the data and the reasons for studying

them before such methods can rightfully be called statistical.

Statistical methods are concerned with data that have been obtained from

taking observations, in the form of measurements or counts, from a source of

such observations. For example, in studying the cost of medical services in a city,

a small percentage of the inhabitants of the city would be selected and asked

about their medical costs. Or, in studying public opinion on a controversial issue

being debated in congress, a set of voters would be selected from across the

country and asked their views concerning the issue.

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