Brand y cola sponsors a survey of 15,559 residents of texas to determine which brand of cola they prefer. forty percent say they prefer brand x, and 60 percent say they prefer brand y. which of the following is the population sample? the residents of texas the 15,559 residents the 40 percent who prefer brand x cola the 60 percent who prefer brand y colabrand y cola sponsors a survey of 15,559 residents of texas to determine which brand of cola they prefer. forty percent say they prefer brand x, and 60 percent say they prefer brand y. which of the following is the population sample? the residents of texas the 15,559 residents the 40 percent who prefer brand x cola the 60 percent who prefer brand y cola