Titlebook: Statistics for Economics, Business Administration, and the Social Sciences; Erling B. Andersen,Niels-Erik Jensen,Nils Kousgaar Textbook 19

合唱隊(duì)

Special Continuous Distributions,A continuous random variable X with density function . where ?∞<μ<+∞ and σ>0, is said to be . with parameters μ and σ. and we write X~N(μ,σ. ).

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糾纏,纏繞

Survey Sampling,The statistical theory of ., often simply called ., is concerned with the selection and analysis of samples selected from finite populations. The purpose of survey sampling is usually to estimate the average (or the sum) of the values of one or more variables for all units in the population.