Online College Courses for Credit

Displaying and Describing Categorial Data/Frequency Distributions

Displaying and Describing Categorial Data/Frequency Distributions

Author: Al Greene

- Teach the difference between frequency and relative frequency and how to make conversions between the two.
- Introduce how to organize categorical data in either a frequency table or contingency table.
- Show how to interpret both marginal and conditional distribution from a contingency table.

This packet defines what frequency distributions are, including frequencies and relative frequencies. It also introduces a contingency table, which is like a frequency distribution, except for 2 or more variables. There are videos on how to construct these, and examples at the end for you to create your own tables.

See More

Try Our College Algebra Course. For FREE.

Sophia’s self-paced online courses are a great way to save time and money as you earn credits eligible for transfer to many different colleges and universities.*

Begin Free Trial
No credit card required

46 Sophia partners guarantee credit transfer.

299 Institutions have accepted or given pre-approval for credit transfer.

* The American Council on Education's College Credit Recommendation Service (ACE Credit®) has evaluated and recommended college credit for 33 of Sophia’s online courses. Many different colleges and universities consider ACE CREDIT recommendations in determining the applicability to their course and degree programs.


What's in this packet

This packet has 2 videos describing how to make frequency and relative frequency distributions, as well as contingency tables. Some terms that may be new to you are:


  • Frequency
  • Relative Frequency
  • Frequency Table
  • Contingency Table
  • Marginal Distribution
  • Conditional Distribution

Source: Greene

Frequency Distributions

This powerpoint gives the definitions for frequency distributions and contingency tables, as well as a short example of each.

Source: Greene

Frequency Distributions

This video shows an example of a frequency distribution, including relative frequency.

Source: Greene

Contingency Table

This video shows a basic example of a contingency table.

Source: Greene