Unit 3c Populations and Samples Study Guide

Of the U.S. adult population, 36% has an allergy. A sample of 1200 randomly selected adults resulted in 33.2% reporting an allergy. Which choice best represents a population? (a)  

• 1,200 Randomly selected adults
• 36% has an allergy
• The U.S. adult population
• The entire population of the U.S.

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Xzayvon selected 90 students currently enrolled at the University of Georgia and asked them how many years they’ve attended the university, how old they are, and if they live on campus.. Which choice best represents the population?

• University of Georgia students currently living on campus.

• All current University of Georgia students

• 8,600 Mercer Universtiy students

• 90 selected students enrolled at University of Georgia

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A survey of 1353 American households found that 18% of the households own a computer. Which choice represents this sample?

• A selection of 1,353 American households surveyed

• All American households

• 18% of households who own a computer

• A random selection of New York City residents

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Cox Cable randomly calls 200 customers and asks them if they are satisfied with their service. Which choice represents this sample?

• Cox Cable

• 65% are satisfied

• 200 randomly chosen Cox Cable customers

• 8 out of 10 customers said the rates were too high

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Is this sample unbiased or biased?

A team of researchers survey 250 people at a movie theater to find out how much money people spend on entertainment.

• unbiased, representative

• biased, non random

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Is this sample below biased or unbiased?

The manager of a bookstore sends a survey to 200 customers who were randomly selected from the customer list that included each of her customers.

• unbiased

• biased

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Is this sample below biased or unbiased?

A radio station published a survey on their website asking if listeners wanted more reports of local news stories. 85% of the responding listeners said no, they did not want more local news.

• unbiased

• biased

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Jules wants to know which professional baseball player is most popular among the 300 students at his school. Which is the most representative and reasonable sample for him to survey?

• collect data from a census of every student at his school

• collect data from a sample of every student in his math class

• collect data from a sample of every 20th student who arrives at school one day

• collect data from a sample of every student on a school sports team

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Darian randomly chose 50 students at Perry Middle and asked them which Connection class did they like best. 38 students chose P.E as their favorite Connections class. If there are 825 students at Perry Middle, predict the number of students who prefer P.E.

• 1086

• 38

• 76

• 627

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Select 3 true statements according to the data process collection described below.

You want to find out how many people at Perry Middle School want to get the COVID-19 vaccination. You ask every 3rd 7th grade student you see in the hallway, “Are you interested in getting the safe and healthy COVID vaccination?”

• The population is all people at Perry Middle School

• The question is biased

• The sample is biased.

• The question is unbiased

• The sample is unbiased.

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