Exploring Two Way Tables in 8th Grade Math

This video tutorial covers the concept of two-way tables, explaining how they organize categorical data using rows and columns. It teaches students how to read and interpret these tables, complete partially filled tables using basic arithmetic, and calculate percentages based on the data presented. The tutorial provides examples to illustrate each concept, ensuring students understand how to draw conclusions from the data.

What is the primary purpose of a two-way table?

• To graphically represent data

• To organize two sets of categorical data

• To organize two sets of numerical data

• To calculate complex mathematical formulas

In the skateboard and snowmobile example, what does the number 80 represent?

• People who like skateboards but dislike snowmobiles

• People who dislike both skateboards and snowmobiles

• Total number of people surveyed

• People who like both skateboards and snowmobiles

How many people were surveyed in the example involving skateboards and snowmobiles?

• 160 people

• 125 people

• 105 people

• 55 people

What does each row in a two-way table represent?

• A different numerical value

• A different category of data

• The total number of responses

• The percentage of responses

What is the total number of people who like skateboards?

• 125 people

• 80 people

• 45 people

• 35 people

How do you find the number of girls who said 'no' to after-school activities?

• Subtract the number of boys from the total 'no' responses

• Add the number of boys to the total 'yes' responses

• Subtract the total 'yes' responses from the total surveyed

• Divide the total 'no' responses by the number of boys

How many boys said 'yes' to after-school activities?

• 40 boys

• 52 boys

• 50 boys

• 92 boys

What percentage of people surveyed dislike both skateboards and snowmobiles?

• 6%

• 36%

• 45%

• 10%

What is the first step in calculating percentages from a two-way table?

• Multiply the totals

• Subtract the least frequent response

• Start with a fraction

• Add all the responses

What percentage of people who like skateboards do not like snowmobiles?

• 36%

• 6%

• 45%

• 10%