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Part B If you were to randomly survey 500 people each from the two largest US cities, would this be a random sample? Why or why not?
Part C If you were to randomly survey 50 people from the phone books of 20 randomly chosen cities, would this be a random sample? Why or why not?
Part D If you were to randomly survey 10 people at 100 random eyeglasses stores across the country, would this be a random sample? Why or why not?
