U.S. Divisions. The U.S. Census Bureau divides the states in the United States into nine divisions: East North Central (ENC), East South Central (ESC), Middle Atlantic (MAC), Mountain (MTN), New England (NED), Pacific (PAC), South Atlantic (SAC), West North Central (WNC), and West South Central (WSC). The following table gives the divisions of each of the 50 states.

ESC PAC MTN WSC PAC MTN NED SAC SAC SAC PAC MTN ENC ENC WNC WNC ESC WSC NED SAC NED ENC WNC ESC WNC MTN WNC MTN NED MAC MTN MAC SAC WNC ENC WSC PAC MAC NED SAC WNC ESC WSC MTN NED SAC PAC SAC ENC MTN

a. Identify the population and variable under consideration.

b. Obtain both a frequency distribution and a relative-frequency distribution of the divisions.

c. Draw a pie chart of the divisions.

d. Construct a bar chart of the divisions.

e. Interpret your results.

* Clean Fossil Fuels.