Consider the observation that people who eat an apple each day have fewer visits to a doctor. Which of the following would represent the third variable that explains the negative correlation in this statement?
A) The high levels of vitamins in apples
B) The overall more nutritious diets of people who regularly consume apples
C) The ages of the apple eaters
D) The types of apples consumed

Question

Quizplus · Accepted Answer

The overall more nutritious diets of people who regularly consume apples could be a third variable that explains the negative correlation between eating apples daily and fewer doctor visits, suggesting that it's not just the apples, but a healthier lifestyle choice in general that contributes to better health outcomes.

Consider the Observation That People Who Eat an Apple Each