Chapter 3 Frequency Distribution

Chapter 3 – Frequency Distributions Know and Be Able To Do

1. You should be able to define a frequency distribution and tell why it is a useful type of descriptive statistic.

2. You should be able to discuss ungrouped and grouped frequency distributions, stating advantages and disadvantages of each.

3. Given the raw scores and the number of intervals, you should be able to construct a frequency distribution of grouped scores

4. You should be able to define and construct relative frequency distributions, cumulative frequency distributions, and cumulative percentage distributions.

5. You should be able to define and compute a percentile or percentile point.

6. You should be able to define and compute the percentile rank of a score.

7. You should be able to describe the four main types of graphic representation of frequency distributions – the bar graph, the histogram, the frequency polygon, and the cumulative percentage curve.

8. You should also understand how to construct and when to use each of the four main types of graphics representations of frequency distributions.

9. You should be able to define “symmetrical” and “skewed” and recognize instances of each.

10. You should be able to recognize, understand, and construct a stem and leaf diagram.

11. You should understand and be able to define the terms in the “Important Terms” section of this chapter.

12. You should understand the illustrative examples.

13. You should be able to do the practice problems.