A 2002 survey by the American Pet Product Manufacturers Association estimated that the average number of ferrets in ferretowning households nationwide was 1.9.
a. What was apparently the sample mean number of ferrets found by the survey?
b. What additional information would be needed in order to set up a confidence interval for the average number of ferrets in all ferret-owning households?
c. If the probability of a household owning any ferrets at all is 0.005, what do we estimate to be the average number of ferrets for all households nationwide?