Peanut allergies are becoming increasingly common in Western countries. Some evidence points to the timing of peanuts' first introduction in the diet as an influential factor, raising the question of whether pediatricians should recommend early exposure or avoidance. A study enrolled infants with a diagnosed peanut allergy and randomly assigned them to either completely avoid peanuts or consume peanuts in small amounts regularly until they reached 60 months of age. At the end of the study, 18 of the 51 infants who had avoided peanuts were still allergic to peanuts. In contrast, five of the 47 infants who had consumed peanuts were still allergic to peanuts.
(a) What are the two variables described? (Select two options.) peanut allergy at 60 months of age (yes or no year the study began peanut consumption (avoid or consume small amounts) percentage of peanuts in diet choice of diaper for infants current age in months
(b) Give the marginal distribution of peanut allergy at 60 months of age, both as counts and as percentages. (Enter your answers rounded to one decimal place.) marginal distribution (with peanut allergy, count): marginal distribution (with peanut allergy, percent): marginal distribution (no peanut allergy, count): marginal distribution (no peanut allergy, percent):