Honda USA is interested in learning what its 550 U.S. dealers think about a new service program Honda provided to the dealers at the beginning of last year. Honda USA wants to know if the dealers are using the program and, if so, what they like and dislike about the program. Honda USA does not want to survey all 550 dealers but wants to ensure that the results are representative of all the dealers.
a. What sampling plan should be used?
b. Why?