Random Samples

The manager of the zoo would like to survey its visitors to determine their favorite exhibit. Which sample below would be unbiased?

• 20 random people in the food court

• Every 10th person who enters the zoo

• 50 random people at the tiger exhibit

• 3 people who are buying souvenirs

Tags

CCSS.HSS.IC.A.1

CCSS.HSS.IC.B.3

To determine their favorite country artist, a radio station randomly surveyed 100 people at a Luke Bryan concert. Determine whether this sample is biased or unbiased.

• Biased

• Unbiased

Tags

CCSS.HSS.IC.A.1

CCSS.HSS.IC.B.3

The cafeteria manager at a local middle school would like to survey students to get their opinion on the new lunch menu. Which of the following sampling methods would be unbiased?

• Select one class at random, then survey each student in that class.

• Obtain an alphabetical list of all students that attend the school, then survey every 10th

  student.

• Have each eighth grader complete a survey during homeroom.

• Randomly survey 10 students in the cafeteria.

Tags

CCSS.HSS.IC.A.1

CCSS.HSS.IC.B.3

A high school is conducting a survey to see how many students have part-time jobs. Which sample below would be unbiased?

• every 10th

  student that

  enters a school football

  game

• 100 random students in the

  school parking lot

• five random students in

  each homeroom

• 50 students from the band and chorus

Tags

CCSS.HSS.IC.A.1

CCSS.HSS.IC.B.3

To determine how much money college students spend on clothes each semester,a researcher surveys 450 college students as they leave the university library. Is this sample biased or unbiased?

• Biased because not everyone goes to the library

• Unbiased because 450 people is enough people to provide accurate data

• Biased because 450 is not enough people to provide accurate data

• Unbiased because everyone goes to the library

Tags

CCSS.HSS.IC.A.1

CCSS.HSS.IC.B.3

To determine the quality of service customers receive, an airline sends an e-mail survey to each customer after the completion of a flight. Will this sample be biased or unbiased?

• Unbiased because each customer receives an email.

• Unbiased because the survey will get many responses.

• Biased because the survey will not get enough responses.

• Biased because not every person reads their email.

Tags

CCSS.HSS.IC.A.1

CCSS.HSS.IC.B.3

You want to estimate the number of students in a high school who ride the school bus. Which sample is best?

• 4 students in the hallway

• All students in the marching band

• 50 seniors at random

• 100 students at random during lunch

Tags

CCSS.HSS.IC.A.1

CCSS.HSS.IC.B.3

CCSS.HSS.IC.B.4

Are the residents of Florida the sample or the population?

• sample

• population

Tags

CCSS.HSS.IC.A.1

CCSS.HSS.IC.B.3

Are all quarters in circulation the sample or the population?

• Sample

• Population

Tags

CCSS.HSS.IC.A.1

CCSS.HSS.IC.B.3

Which one is the population?

• 5 ants

• Colony of ants

Tags

CCSS.HSS.IC.A.1