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Exercise

Working together

Displayed to the right are the plots you created in the previous exercise from a model baby_wt ~ gestation * smoke. Which of the following statements are true?

  1. The effect size of gestation is the slope of the model graph.
  2. The effect size of smoke is the vertical offset from the smoker to the nonsmoker line.
  3. No interaction between gestation and smoke could ever be seen in this (slightly different) model: baby_wt ~ gestation + smoke
  4. No interaction between gestaton and smoke can be seen in the model being plotted:baby_wt ~ gestation * smoke.
  5. The interaction between gestation and smoke can be seen in the difference in slopes between the smoker and nonsmoker lines. This is how smoke modulates the effect size of gestation.
  6. The interaction between gestation and smoke can be seen in the changing vertical offset between the smoker and nonsmoker lines. This is how gestation modulates the effect size of smoke.
Instructions
50 XP
Possible Answers