A researcher studying consumer buying habits asks every 20th person entering Publix Supermarket how many times per week he or she goes grocery shopping. She then records the answer as T.
a. Is T = 3 an example of (1) a sample, (2) a variable, (3) a statistic, (4) a parameter, or (5) a data value? Suppose the researcher questions 427 shoppers during the survey.
b. Give an example of a question that can be answered using the tools of descriptive statistics.
c. Give an example of a question that can be answered using the tools of inferential statistics.