1. Which of the following is not true about histograms?

Question

A. The bars must touch each other.**
B. A histogram may be symmetric or skewed depending on the selection of bin width
C. Each bin must have the same width.
D. Histograms may represent categorical data.
E. Histograms may have gaps or clusters.

2. Suppose that a frequency histogram and a cumulative frequency histogram are constructed from the same set of data, using the same classes. Then, for each class,
A. the frequency is less than the cumulative frequency
B. the frequency is less than or equal to the cumulative frequency**
C. the frequency is equal to the cumulative frequency
D. the frequency is greater than or equal to the cumulative frequency

3. When ordering doors for new construction, the following variables are specified. Which of these variables is quantitative?
A. Purpose of door: interior or exterior.
B. Width of door: opening in inches.**
C. Core of door: solid core or hollow core.
D. Color of door: White, oak stain, natural, or ivory.

4. Which of the following statements are true?
1) Stemplots are useful for both quantitative and categorical data.
2) Stemplots are equally useful for both small and large data sets.
3) Stemplots can show symmetry, gaps, clusters, and outliers in the data.

A. 1 only
B. 2 only
C. 3 only
D. 1 and 3
E. 2 and 3**