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2/4/2022-HW Sampling and Bias cloned 2/17/2022

Last updated over 2 years ago
19 questions
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1

Write a short description of the population

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Write a short description of the sample

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Read the scenarios below.

Use the scenarios to categorize which choices best represent a population and which choices best represent a sample.

*A beverage company wants to see if people in the United States like their new logo.
*A famous rockband wants to see what what people, who bought their last album, think of their songs.
*Before a nation wide election, a polling place was trying to see who would win.
*A store owner wants to survey customers about their favorite toy.
*A mayor wants to see if the people in his town think he is doing a good job.

Drag the choices below to the correct category.

Does it represent a population or a sample?

  • The beverage company surveys every person in the United States
  • The band surveys a selection of 3,294 people who bought the album
  • The beverage company surveys a selection of shoppers from different states.
  • The store owner surveys all of the customers who buy toys
  • The band surveys every person who bought the album
  • A selection of voters of different ages are surveyed
  • 242 voters are randomly selected from the town
  • The residents of the entire town are selected
  • All the voters are selected
  • The store owner randomly selects customers throughout the day
  • Population
  • Sample
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The 2003 team payroll of the Baltimore Orioles was $69,452,275.

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In a survey of a sample of US adults, 62 % owned a portable cellular phone.

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In a recent survey at the University of Arizona, 89 students were majoring in Astronomy.

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Nineteen percent of a sample of Indiana ninth graders surveyed smoked cigarettes daily.

In June 2008 Parade magazine posed the following question: “Should drivers be banned from using all cell phones?” Readers were encouraged to vote online at www.parade.com. The July 13, 2008, issue of Parade reported the results: 2407 (85%) said “Yes” and 410 (15%) said “No.”
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What type of sample did the Parade survey obtain?

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Explain why this sampling method is biased.

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Is 85% likely to be greater than or less than the percentage of all adults who believe that cellphone use while driving should be banned?

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Explain your answer from #10.

To help eliminate bias, a reporter from Parade decides she will go out and ask people in person if they think drivers should be banned from using cell phones. She lives close to the local high school so she goes to the parking lot at 3:00 pm and asks the first 100 people she sees.
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What type of sample did the Parade survey obtain?

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Explain why this sampling method is biased.

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

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Researchers interview the first 30 students to enter the school doors in the morning.

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A car dealership assigns each car in a dealership a number and then uses a random-number table to select the cars to be inspected.

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A teacher wants to know the average time spent doing homework by the students in her class of 20 girls and 5 boys.
She selects the first five students who raise their hands. What type of sampling is this?

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A candidate for student council wants to poll students to see how well his campaign is going. What collection method should he use to gather his information?

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In a recent poll to measure Hugo's progress in his election campaign, 74 out of 150 people in the random sampling support him in his efforts. What is the best conclusion based on the polls?