The Editors of a National Automotive Magazine Recently Studied 30

question 81

Multiple Choice

The editors of a national automotive magazine recently studied 30 different automobiles sold in the United States with the intent of seeing whether they could develop a multiple regression model to explain the variation in highway miles per gallon. A number of different independent variables were collected. The following regression output is the result of using a forward selection stepwise regression approach. Which of the following might explain why no other independent variables entered the model?

• A) No other variable had a correlation with the dependent variable that was close to 1.0.
• B) None of the remaining variables had a positive correlation with y.
• C) The remaining variables must be nearly perfectly correlated with the two variables already in the model.
• D) Given the two variables already in the model, none of the others could add significantly to the percentage of variation in the y variable that would be explained by the model.

Recognize factors influencing physical growth and BMI in children.

Appreciate the role of genetics and environment in determining physical attributes like height and weight.

Understand the significance of physical growth variations within and across cultures.

Comprehend the social and psychological impacts of physical growth and body image during middle childhood.

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Definitions:

Unconditioned Stimulus

An unconditioned stimulus is a stimulus that automatically triggers a reflexive response without any prior learning or conditioning.

Discrimination

Unjust or prejudicial treatment of different categories of people, especially on the grounds of race, age, or sex.

Generalization

The process in learning where a response to a specific stimulus is extended to include responses to similar stimuli.

Biological Preparedness

The concept that certain associations are learned more readily than others due to evolutionary predispositions.