A Grocery Store Is Interested in Determining Whether Its Customers

Multiple Choice

A grocery store is interested in determining whether its customers are satisfied with the quality of service provided.To collect the necessary data,interviewers have been hired to stand near the store's exits and to survey customers who have the time and interest to be surveyed.This type of sampling is called:

A) systematic random sampling.
B) ratio sampling.
C) convenience sampling.
D) stratified sampling.