1. How does one construct a stem-and-leaf diagram? What are the advantages of this type of diagram?

2. How may the box-and-whisker plot be used to describe data? How are the fol- lowing terms used in a box-and-whisker plot?

a. Median
b. Alpha percentile
c. Interquartile range

3. Refer to the following dataset that shows the class interval (and frequency in parentheses):

{0.0-0.4 (20); 0.5-0.9 (30); 1.0-1.4 (50); 1.5-1.9 (40); 2.0-2.4 (10);
2.5-2.9 (20); 3.0-3.4 (20); 3.5-3.9 (10)}

Construct a relative frequency histogram, a cumulative frequency histogram, a relative frequency (%) histogram, a cumulative relative frequency (%) his- togram, a frequency polygon, and a relative frequency polygon. Describe the shapes of these graphs. What are the midpoint and limits of the interval, 2.0-2.4?