Application

Now that you have completed all of the activities in this chapter, use the concepts and techniques that you've learned to respond to these questions.

  1. Scenario: Return to the NHANES SRS data table. Exclude and hide respondents under age 18.

    1. Perform a regression analysis for adult respondents with BMI as Y, and use waist circumference and gender as the independent variables. Discuss the ways in which this model is or is not an improvement over a model that uses only waist circumference as a predictor.

    2. Perform a regression analysis extending the previous model, and this time add an interaction term between waistline and gender.

  2. Scenario: High blood pressure continues to be a leading health problem in the United States. In this problem, ...

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