CCSS.Math.Content.7.SP.A.1

A computer manufacturer surveys its customers who purchased laptop computers to ask what software the company should include with its computer.  Identify the population.

• Customers who purchased laptop computers.
• Customers of the store.
• Customers who are interested in software.
• Computer manufacturers

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CCSS.Math.Content.7.SP.A.1

The choir director in a high school wants to know how the students in the school feel about singing. If the director selects 100 girls and 100 boys to complete a survey, which method will result in a biased sample?

• The students will be selected from the choir
• The students will be selected randomly throughout the school
• The students will be selected on Wednesday afternoon before the choir concert
• The choir director will select five students from each of the forty homerooms in the school

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CCSS.Math.Content.7.SP.A.1

A survey company was trying to see if people in a state thought the pollution was too high.  Which choice BEST represents a population?

• A selection of people from each neighborhood in the state.
• A selection of people who live in small towns.
• Every person in the state.
• A selection of people who live in dirty neighborhoods.

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CCSS.Math.Content.7.SP.A.1

Marianne wanted to know students' opinion on the new schedule at school. She places students' names in a container and randomly picks out 20 names. 

• Convenience Sampling
• Systematic Sampling
• Random Sampling
• Volunteer response

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CCSS.Math.Content.7.SP.A.1

Why do we randomly select our samples?

• for control
• reduce bias
• so we don't get the same answers from everyone
• to eliminate confounding results

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CCSS.Math.Content.7.SP.A.1

The librarian used the computer system to create a random list of 60 items that are currently checked out. The list showed 25 fiction books, 15 nonfiction books, 12 movies, and 8 music CDs.

Based on this data, what inference can be made about the types of items that the library customers check out?

• half as many CDs are checked out than movies

• More non-fiction books are checked out than fiction books

• customers who check out books don't check out movies

• About twice as many books are checked out than other items

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CCSS.Math.Content.7.SP.A.1

Biased or Random?

Zane wants to determine the favorite candy among all 7th graders. So he asks all the people who sit in his row in Math class.

• Biased

• Random

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CCSS.Math.Content.7.SP.A.1

According to a random telephone survey, 85% of all working adults in the U.S. are satisfied with their current job. If I asked 500 adults, how many do you predict would be satisfied with their current job?

• 85 adults
• 340 adults
• 500 adults
• 425 adults

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CCSS.Math.Content.7.SP.A.1

How many students sent more than 29 text messages?

• 45

• 25

• 95

• 199

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CCSS.Math.Content.7.SP.A.1

Biased or Random?

Justin wants to determine who the most popular Twitch/tv streamer in the United States is. So he hacks the U.S. Census and includes the question in the 2020 census form that goes to every household in America.

• Biased sample

• Random sample

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CCSS.Math.Content.7.SP.A.1