A TV ratings company wants to evaluate TV viewing habits in Chicago. Given the population of all Chicago residents, which statements describe a random sample?
a. The sample is chosen by a computer randomly selecting residents from all Chicago addresses.
b. The sample consists of residents in one specific Chicago zip code.
c. The sample includes all Chicago residents whose last name begins with the letter Z.
d. The sample is selected by choosing every 10th resident from a list of all Chicago residents.
e. The sample is pulled at an electronics store from shoppers who are looking to purchase a TV.