Categorical Data and Relative Frequency

What is Categorical Data?

• (qualitative data) Data that fits into one of several different groups or categories.

• (numerical) Data that can be placed on a numerical scale or can be compared.

• Data that can't be collected.

• A type of cat.

Which type of data is this?

Time it takes to get to school.

• Quantitative

• Categorical

Which type of data is this?

Hair Color

• Quantitative

• Categorical

Mood can be measured as sad, flat, ambivalent or happy. What type of data is this?

• Numerical

• Categorical

The results for 741 teens who use social media, when asked what effect they believe social media has on people their age is summarized below.

219 said the effect is positive

211 said the effect is negative

311 said the effect was neutral.

Which is the best display for this data?

• Bar graph

• Histogram

• Circle graph

• Frequency table

• Relative frequency table

Answer explanation

Use histograms for numerical data.

If there are 300 seventh graders, how many students prefer choir?

• 96
• 24
• 75
• 42

If 200 people were surveyed, approximately how many people like pepperoni and cheese as their topping?

• 100 people

• 150 people

• 50 people

• 75%

What is the relative frequency of the number of studentas that have visited Maine?

• 3%
• 15%
• 5%
• 30%

Tags

CCSS.MATH.CONTENT.8.SP.A.4

Students at a school were asked if they preferred to watch action or

comedy movies. The table below shows the students’ responses.

What percent of the girls preferred to watch action movies?

• 32%

• 20%

• 16%

• 10%

Tags

CCSS.MATH.CONTENT.8.SP.A.4

What is the relative frequency of students speaking German?

• 7%
• 1%
• 100%
• 12%