Reach into your wallet, pocket, or wherever you can find at least ten coins, and sort all of the coins you have by type.
a. Count how many of each kind of coin you have (pennies, nickels, and so on, or the equivalent for your country). Draw a pie chart illustrating the distribution of your coins.
b. In part (a), "kind of coin" was the variable of interest for each coin. Is that a categorical, ordinal, or quantitative variable?
c. Now consider the total monetary value of all of your coins as a single data value. What type of variable is it?
d. Suppose you had similar data for all of the students in your statistics class. Write a question for which the variable "kind of coin" is the variable of interest for answering the question. Then write a question for which "total monetary value of the coins" is the variable of interest for answering the question.