100+ New observations new obs PowerPoint (PPT) Presentations, New observations new obs PPTs

New observations new obs - PowerPoint PPT Presentation

Time series

Time series. Characteristics. Non-independent observations (correlations structure) Systematic variation within a year (seasonal effects) Long-term increasing or decreasing level (trend) Irregular variation of small magnitude (noise). Where can time series be found?.

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762 views • 51 slides

Qualitative predictor variables

Qualitative predictor variables. Examples of qualitative predictor variables. Gender (male, female) Smoking status (smoker, nonsmoker) Socioeconomic status (poor, middle, rich). An example with one qualitative predictor. On average, do smoking mothers have babies with lower birth weight?.

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885 views • 41 slides

Prediction concerning the response Y

Prediction concerning the response Y. Where does this topic fit in?. Model formulation Model estimation Model evaluation Model use. Translating two research questions into two reasonable statistical answers. What is the mean weight, ? , of all American women, aged 18-24 ?

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556 views • 40 slides

Outline

Assumptions of linear statistical models. Types of Transformations Alternatives to Transformations. Outline. Transformations in Statistical Analysis. Effect addivitity Normality Homoscedasticity Independence. Model Assumptions. Homoscedasticity Normality Additivity Independence.

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358 views • 21 slides

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New observations new obs - PowerPoint PPT Presentation

Time series

Qualitative predictor variables

Prediction concerning the response Y

Outline