Chapter 4 Describing the Relation Between Two Variables 4.1 Scatter Diagrams; Correlation.
2.6 The Question of Causation. The goal in many studies is to establish a causal link between a change in the explanatory variable and a change in the.
Sullivan – Statistics: Informed Decisions Using Data – 2 nd Edition – Chapter 4 Introduction – Slide 1 of 3 Chapter 4 Describing the Relation Between Two.
STAT 104: Section 2 4 Oct, 2007 TF: Daniel Moon. TF Daniel Moon G2 (A.M. in Statistics Dept) Email: [email protected]@fas.harvard.edu Office hour:
Statistics: The Science of Learning from Data Data Collection Data Analysis Interpretation Prediction Take Action W.E. Deming “The value of statistics.
Warm-up 4.4 Designing Experiments to Reduce Variability In order to assess the effects of exercise on reducing cholesterol, a researcher sampled 50 people.
1 10. Causality and Correlation ECON 251 Research Methods.
Chapter 4 Correlation and Regression Understanding Basic Statistics Fifth Edition By Brase and Brase Prepared by Jon Booze.
4.2: Experiments. Section 4.2 Experiments After this section, you should be able to… DISTINGUISH observational studies from experiments DESCRIBE the language.
Analysis of Two-Way tables Ch 9. In statistics we call categorical variables present in an experimental design: FACTORS Each possible value of the.
Warm-up An Exercise in Sampling: Rolling Down the River 1.What will the treatment be? 2. What will the response variable be? 3.How will the response variable.
DO NOW Read Pages 222 – 224 Read Pages 222 – 224 Stop before “Goals of Re-expression” Stop before “Goals of Re-expression” Answer the following questions:
