Metropolitan Area Albany, NY Albuquerque, NM Appleton, WI Atlanta, GA Austin, TX Baltimore, MD Birmingham, AL Boise City, ID Boston, MA Buffalo, NY

Suppose that there are the 100 MSAs or cities that are listed in the MetAreas data.  In practice though we might sample instead of looking at all 100 cities because collecting data can be expensive.  If you took a sample of 10 cities what is the worst possible average rating you could have gotten?