Approximately 1.5 million high school students take the Scholastic Aptitude Test (SAT) each year and nearly 80% of the college and universities without open admissions policies use SAT scores in making admission decisions (College Board, March 2009). The current version of the SAT includes three parts: reading comprehension, mathematics, and writing.

A perfect combined score for all three parts is 2400. A sample of SAT scores for the combined three-part SAT are as follows:

a. Show a frequency distribution and histogram. Begin with the first class starting at 800 and use a class width of 200.
b. Comment on the shape of the distribution.
c. What other observations can be made about the SAT scores based on the tabular and graphical summaries?

Dividend Yield % Dividend Yield % Company American Express Johnson & Johnson Bank of America McDonald's Cisco Systems Procter & Gamble United Technologies Wal-Mart Stores ExxonMobil Hewlett-Packard 1665 1275 1650 1590 1475 1490 1525 2135 1560 1880 1680 1560 1150 1420 1440 940 1645 1060 1485 1755 1260 1390 1780 1585 1990 1375 1730 1175