In a survey of eating habits, 3800 national adults were selected randomly and contacted by telephone. Respondents were asked, "Typically, how many times per week do you purchase food at a fast-food restaurant or convenience store?" On average, those surveyed purchased food at a fast-food restaurant or convenience store 2.4 times per week.

Which of the following is true with respect to this scenario?

a.) 3800 is the size of the population being studied
b.) 2.4 is a parameter, and represents an estimate of the unknown value of a statistic of interest
c.) 2.4 is a statistic and represents an estimate of the unknown value of a parameter of interest.
d.) None of the above