Annette wants to find out which of two toothpaste brands people living in the town of Springville prefer, brand A or brand B. She uses a random sample to make this generalization: 60% of the population of Springville prefers brand A over brand B. For which random sample would this generalization be valid? A.
every third person who walks into one of the neighborhood convenience stores, which stocks several toothpaste brands
B.
every fourth student who attends Annette’s school in Springville
C.
every other customer at all the convenience stores in Springville that stock both brand A and brand B
D.
every mother who shops at a convenience store in Springville