概率论与数理统计复习总结第一章

Population(总体)

A set of all elements of interest in a particular study

Examples:

⎼ All gelatin capsules of a particular type produced during a

specified period

⎼ All individuals who received a B.S. in engineering

⎼ All students who’s mathematics score above 70

Ø Sample(样本)

A subset of the population

 

We always use Sample to draw conclusions for

Population, because of the constraints on time, money

and other resources

 

Inferential statistics (推理统计)

 

Stratified Sampling(分层抽样)

 

Graphical methods

⎼ Stem-and-Leaf display(茎叶图)

⎼ Dotplots(散点图)

⎼ Histograms(直方图)

⎼ Boxplots(箱线图)

Ø Numerical methods数值方法

⎼ Mean(均值)

⎼ Deviation(标准差)

⎼ Correlation(相关性)

 

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