Chapter 2, Problem 1CSD

Recall that, each year, Forbes magazine publishes a list of the world’s richest people. On page 37, we constructed a table, based on a 2013 Forbes article, that shows the 25 richest people in the world, as of March of that year.

1. a. For each of the five columns of the table, classify the data as either qualitative or quantitative; if quantitative, further classify it as discrete or continuous. Also, identify the variable under consideration in each case.
2. b. Obtain frequency and relative-frequency distributions of the citizenship data.
3. c. Construct and interpret a pie chart for the citizenship data.
4. d. Construct and interpret a bar chart for the citizenship data.
5. e. Use limit grouping, with grouping by 10s, to organize the age data into frequency and relative-frequency distributions.
6. f. Construct frequency and relative-frequency histograms of the age data based on your grouping in part (e).
7. g. Identify and interpret the (rough) shape of your histograms in part (f) in terms of modality, symmetry, and skewness.
8. h. Obtain stem-and-leaf diagrams of the age data, using both one and two lines per stem. Which of the two stem-and-leaf diagrams corresponds to your frequency histogram in part (f)?
9. i. Construct a dotplot of the age data.
10. j. Use cutpoint grouping to organize the wealth data into frequency and relative-frequency distributions. Employ a class width of 5 and a first cutpoint of 20.
11. k. Construct frequency and relative-frequency histograms of the wealth data based on your grouping in part (j).
12. l. Identify and interpret the shape of your histograms in part (k) in terms of modality, symmetry, and skewness.
13. m. Truncate each wealth to a whole number (i.e., find the greatest integer in each wealth), and then obtain a stem-and-leaf diagram of the resulting data, using two lines per stem.
14. n. Round each wealth to a whole number, and then obtain a dotplot of the resulting data.