Slide 1 Slide 2 X Treatment population Control population 0 Examples: Drug vs. Placebo, Drugs vs. Surgery, New Tx vs. Standard Tx Let X = decrease (–) in cholesterol level…

Slide 1 Lecture (14,15) More than one Variable, Curve Fitting, and Method of Least Squares Slide 2 Two Variables Often two variables are in some way connected. Observation…

Slide 1 The Effect Size The effect size (ES) makes meta-analysis possible The ES encodes the selected research findings on a numeric scale There are many different types…

Correlation and Simple Linear Regression Pearson’s Product Moment Correlation (sample correlation r estimates population correlation r) Measures the strength of linear…

Slide 1 Overview of Biostatistical Methods 1 X Treatment population Control population 0 Overview of Biostatistical Methods Examples: Drug vs. Placebo, Drugs vs. Surgery,…

Slide 1 Overview of Biostatistical Methods 1 X Treatment population Control population 0 Overview of Biostatistical Methods Examples: Drug vs. Placebo, Drugs vs. Surgery,…

Lecture (14,15) More than one Variable, Curve Fitting, and Method of Least Squares Two Variables Often two variables are in some way connected. Observation of the pairs:…

Chapter 4 Scatterplots and Correlation Chapter outline Explanatory and response variables Displaying relationships: Scatterplots Interpreting scatterplots Adding categorical…

ECONOMETRICS I (EKN309) CHAPTER 1 THE NATURE OF REGRESSION ANALYSIS Regression as the main tool of econometrics (step 5). NOW: the nature of this tool I.1 HISTORICAL ORIGIN…

Slide 1 Overview of Biostatistical Methods 1 X Treatment population Control population 0 Overview of Biostatistical Methods Examples: Drug vs. Placebo, Drugs vs. Surgery,…