A Group of Economists Surveys Consumers of Smartphones to See

Multiple Choice

A group of economists surveys consumers of smartphones to see which devices consumers prefer. The question asked of shoppers is whether they are purchasing a Windows device or another type. The economists count the number of shoppers expressing preference for a Windows device. The survey samples about 50 shoppers from among several million. Which of the following criteria is violated regarding a binomial model?

A) There are more than two possibilities for smartphones, and the binomial allows only two categories: success and failure.
B) This is sampling without replacement and, therefore, the observations are dependent despite the large population.
C) The binomial has to be a finite count between zero and some fixed upper value.
D) None of the criteria listed is violated.