Is “a dog, man’s best friend”? One would think so with 60 million pet dogs nationwide. But how many friends are needed? In the USA Snapshot

(February 22, 2005), the following statistics were reported.

Number of Pet Dogs Percentage Number of Pet Dogs Percentage One 66 Four 3 Two 24 Five or more 2 Three 5 Source: U.S. Pet Ownership & Demographics Sourcebook, Pedigree Food for Dogs

a. Is this a probability distribution? Explain.

b. Draw a relative frequency histogram to depict the results shown in the table.