LMT - Two-Way Tables Lesson

Math_Lesson_TopBanner.png Two-Way Tables

In this lesson, we will discuss and interpret two-way tables.

A two-way table organizes data about two categorical variables. The data is organized into rows and columns.

Let's take a look...

Ex. 1:
Fifty students were asked whether or not they like to listen to rock 'n roll music or country music.

The results to the poll are as follows:

  • 12 students like rock 'n roll music and country music
  • 20 students like rock 'n roll music but not country music
  • 10 students like country music but not rock 'n roll music
  • 8 students do not like rock 'n roll music or country music

 The table below shows this information in a two-way table.

12 likes country and rock and roll 12 likes country does not like rock and roll 20 does not like country and likes rock and roll 8 does not like country or rock and roll

To read the two-way table, you see where the columns and rows share a cell of the table. That value then represents the number of people, in this case, who fall into the two categories of that specific row and column.

Ex. 2:
Now let's see if you can answer a question or two about data displayed in a two-way table.

Disposable AA 10 Disposable AAA 15 Total Disposable 25 Rechargeable AA 6 Recharcheable AAA 14 Total recharcheable 20 Total AA 16 Total AAA 29 Total 45

Which correlation does the two=way table suggest?

a. The rechargeable batteries tend to be AA.

b. The rechargeable batteries tend to be AAA.

c. There is not a correlation between battery size and type of battery.

d. The disposable batteries tend to be AA.

Assignment

Now that you have spent some time learning about Two-Way Tables Models, you are ready to complete your Two-Way Tables Homework. Click here to download the Two-Way Tables Homework Links to an external site..

Once you have completed the Two-Way Tables Homework, check your even answers and make sure you ask your teacher if you have any questions Links to an external site.. When you feel confident in your work, you'll need to take the Two-Way Tables Homework Quiz. Make sure you have your Homework completed and with you when you log in to take it. This is a timed quiz and you'll only have time to enter the answers from your HW. You will not have time to work them out during the quiz.

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