Relative Frequency and Data Interpretation

This lesson introduces the concept of relative frequency, explaining how to create a relative frequency table using survey data. It covers joint and marginal relative frequencies, using a two-way table to find these frequencies, and converting decimals to percentages. The lesson concludes with a summary and a homework assignment.

What is the main topic of this lesson?

• Cumulative Frequency

• Frequency Distribution

• Relative Frequency

• Absolute Frequency

What is the total number of students surveyed by Ken?

• 90

• 80

• 70

• 60

How many students preferred basketball in Ken's survey?

• 40

• 32

• 28

• 20

How do you express relative frequency using decimals?

• Add all frequencies

• Multiply by 100

• Divide by total frequency

• Subtract from total

What is a joint relative frequency?

• Frequency of a single category

• Frequency divided by total row or column

• Frequency not in total row or column divided by grand total

• Total frequency of all categories

What does a marginal relative frequency represent?

• Frequency of a single category

• Specific characteristic in total row or column

• Total frequency of all categories

• Frequency not in total row or column

What additional data did Ken record in his survey?

• Age of students

• Favorite color

• Gender of students

• Grade level

How do you calculate relative frequencies from a two-way table?

• Multiply each frequency by 100

• Subtract from total

• Add all frequencies

• Divide each frequency by the grand total

How do you convert a decimal to a percentage?

• Move the decimal two places to the left

• Divide by 10

• Move the decimal two places to the right

• Multiply by 10

What percentage of girls liked basketball?

• 25%

• 15%

• 7.5%

• 22.5%