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Active Learning Lecture Slides Chapter 20 Curved Patterns Active Learning Lecture Slides For use with Classroom Response Systems

A transformation is a re-expression of a variable by applying a function to each observation. True False

A transformation is a re-expression of a variable by applying a function to each observation. True False

Which of the following are possible transformations? Reciprocal Log Square All of the above

Which of the following are possible transformations? Reciprocal Log Square All of the above

The process of choosing an appropriate transformation is usually iterative: Try a transformation to see whether it makes the association more linear. True False

The process of choosing an appropriate transformation is usually iterative: Try a transformation to see whether it makes the association more linear. True False

You should only compare r2 between regression equations that use the same observations and same response. True False

You should only compare r2 between regression equations that use the same observations and same response. True False

A visual comparison requires showing each equation on its own plot. True False

A visual comparison requires showing each equation on its own plot. True False

Often the nonlinear pattern is less distinct in the residual plot than in the scatterplot. True False

Often the nonlinear pattern is less distinct in the residual plot than in the scatterplot. True False

The slope in an equation that transforms both x and y using logs is known as the elasticity of y with respect to x. True False

The slope in an equation that transforms both x and y using logs is known as the elasticity of y with respect to x. True False

The elasticity of y with respect to x describes… how small percentage changes in x are associated with small percentage changes in y. how small percentage changes in y are associated with small percentage changes in x. how changes in y effect changes in x. how changes in x effect changes in y.

The elasticity of y with respect to x describes… how small percentage changes in x are associated with small percentage changes in y. how small percentage changes in y are associated with small percentage changes in x. how changes in y effect changes in x. how changes in x effect changes in y.