Samples and Populations Practice

In a sample of voters in Harrisburg, 18 out of 25 favored creating a new shopping center. If 50,000 people vote in the next Harrisburg election, how many are likely to vote in favor of the new shopping center based on this sample?

• 40,000

• 14,000

• 36,000

• 28,000

In a sample of people in the school district, 16 out of 25 favored building a new football stadium. If 6,000 people vote in the next local election, how many are likely to vote in favor of the new football stadium based on this sample?

• 2,980

• 3,840

• 2,160

Assuming these are accurate samples, about how many total middle school students could you infer do not like ice cream if there are a total of 750 students in the school?

• 139 students

• 278 students

• 417 students

• 472 students

Bob asked 8 band members and found that 3 members play more than one instrument. Use his results to predict how many of Oak School's 152 band members play more than one instrument.

• 3/8

• 405

• 57

• 60

The table shows the results of a survey of 200 people attending a hockey game.
The attendance for the hockey game is about 25,000 visitors each game.  Based on the table, how many people out of 25,000 could be expected to buy a pennant?

• 1,375

• 1,650

• 2,750

• 3,850

A small town as 2500 residents.  In a random sample of 125 residents, 2 have the flu.  Predict the number of residents of the town who have the flu.

• 20

• 40

• 200

• 400

A high school has 1500 students.  In a random sample of 50 students, 32 own one or more pets.  Predict the number of students at the high school who own one or more pets.

• 480

• 960

• 48

• 96

A poll was taken of Hobby Middle School, 25 out of 30 students said they would prefer pizza on Friday’s. Out of 1200 students, what is a reasonable prediction of how many students would prefer pizza on Fridays?

• 100

• 1000

• 10

• 1

A sample in which every person, object, or event has an equal chance of being selected.

• Random sample.

• Biased sample.

Ana wants to know the average student’s opinion of the tardy policy at her school. Which group of students should she survey in order to achieve the most accurate results?

• Thirty randomly selected students from her school

• Thirty students who are rarely tardy

• thirty of her friends