QUESTION 17 Ascatter plot of the number of doctors and the number of who report they have healthy eating habits for neighborhoods in New York City reveals a positive association. The most likely explanation for this positive association is a. Doctors tend to eat healthily, so an increase in doctors will increase the number of people who report that they have healthy eating habits. b. Large cities tend to have both more doctors and greater access to factors that lead to healthy eating (. g. Income, healthy food stores), so the association is explained by a third variable, the size of the city Oc Chies with higher incomes tend to have more doctors and more people shopping for healthy foods, so income is the only confounding variable Od. Doctors encourage people to eat healthily, so an increase in the number of doctors is causing an increase in the number of people reporting they eat healthily