Answer
a. Yes, it is the unvaccinated dogs.
b. No. Because the owners of the dogs have access to the information regarding the vaccination of their pets.
c. Sampling or chance error.
d. The sampling or chance error could be reduced if the variance of elements of the target group could be minimized.
Work Step by Step
a. Yes, it is the unvaccinated dogs.
b. No. Because the owners of the dogs have access to the information regarding the vaccination of their pets.
c. Sampling or chance error.
d. The sampling or chance error could be reduced if the variance of elements of the target group could be minimized.