A researcher collects a sample of n = 20 Introductory Psychology textbooks and records the number of pages in each book. The results are then placed in a grouped frequency distribution table using intervals of 0-99 pages, 100-199 pages, 200, 299 pages, and so on. If the results were converted into a frequency distribution graph, what kind of graph should be used?
- A bar graph
- A histogram
- A polygon
- Either a histogram or a polygon