'Lurking variables' diaporamas de présentation

5-Minute Check on Section 4-1b

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5-Minute Check on Section 4-1b

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Chapter 4: More on Two-Variable Data

Chapter 4: More on Two-Variable Data. 4.1 Transforming Relationships 4.2 Cautions 4.3 Relations in Categorical Data. Year 1990 1993 1994 1995 1996 1997 1998 1999. Cell Phone Users (thousands) 5,283 16,009 24,134 33,786 44,043 55,312 69,209 86,047. Example.

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APSTAT Section 3 Experimental Design

APSTAT Section 3 Experimental Design. Chapter 11 Simulation. HOW TO SET UP Describe the experiment Assumptions Independence Percentages Randomization Assign Digits (Table) Explain TI83 procedure Conduct Multiple Simulations Conclusion (Estimate Probability).

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Chapter 6 Association between Quantitative Variables

Chapter 6 Association between Quantitative Variables. 6.1 Scatterplots. Is household natural gas consumption associated with climate? Annual household natural gas consumption measured in thousands of cubic feet (MCF)

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Section 3.4 (Agresti & Franklin)

Section 3.4 (Agresti & Franklin). What are some cautions in Analyzing Associations?. Extrapolation is dangerous. Example: Mean temperature in the United States, 1895 - 2003. Extrapolation is Dangerous.

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AP Statistics Section 4.3 Establishing Causation

AP Statistics Section 4.3 Establishing Causation. When we study the relationship between two variables, we often hope to show that changes in the explanatory variable cause changes in the response variable.

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Scatterplots & Correlation

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Chapter 3 Association: Contingency, Correlation, and Regression

Chapter 3 Association: Contingency, Correlation, and Regression. Section 3.4 Cautions in Analyzing Associations. Extrapolation Is Dangerous. Extrapolation: Using a regression line to predict y -values for x -values outside the observed range of the data.

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Chapter 4: More on Two Variable Data

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Experimental Designs

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Chapter 9: Regression Wisdom

Chapter 9: Regression Wisdom. AP Statistics. Other Regression Issues. Subsets Dangers of extrapolation Possible effects of outliers, high leverage, and influential points Problems with regression of summary data Mistakes of inferring causation. Subsets. Extrapolation.

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MAGIC 8-BALL

MAGIC 8-BALL. By: Connie Saltzman, Brandi Kaminski, & Joe Muller. The Facts. The Magic 8 Ball has been used for fortune telling since its creation by Tyco in 1946. It is a hollow, plastic sphere resembling an oversized, black and white 8-ball.

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1. Process Mapping

Six Sigma Definitions. 1. Process Mapping. Process mapping is used to document process to examine part and information flow. It is a key tool in identifying opportunities for improvement. 2. QFD (Quality Function Deployment).

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Observational Studies

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BHV 390 Cause and Effect Kimberly Porter Martin, Ph.D.

BHV 390 Cause and Effect Kimberly Porter Martin, Ph.D. Requirements for Cause and Effect. The causal variable and the effect variable must be consistently, but not necessarily always associated with one another. The causal variable must ALWAYS preceed the effect variable in time.

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9.1 - Correlation

9.1 - Correlation. Correlation = relationship between 2 variables ( x,y ): x= independent or explanatory variable y= dependent or response variable Types of correlations (make scatter plot to determine) Negative Linear As x ?, y ? Positive Linear As x ?, y ? Non-linear

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Strong association between the variables.

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