The following set of data shows the number of alcoholic drinks that students at a Kansas university reported they had consumed in the past month:

a. Assume the data set is a sample. Calculate the range, variance, standard deviation, and interquartile range for the data set.
b. Assume the data set is a population. Calculate the range, variance, standard deviation, and interquartile range for the data set.
c. Indicate the relationship between the statistics and the respective parameters calculated in parts a and b.