Sheldon wants to study the correlation between the age of a pup, in weeks, of a certain breed and its weight. Sheldon has a dog of that breed that just had a litter of four pups. Sheldon records the weight of all of the pups once a week for three months. On the basis of his analysis, he
draws his conclusion.
What kind of statistical investigation is Sheldon performing?
OA theoretical study
OB.
experimental study
Oc observational study
OD. survey