8.1 Samples and Populations

You want to know what students at your school would most like to attend: a professional football, basketball, or baseball game. Which sample should you choose for your survey?

• 5 of your friends

• The basketball team

• 25 random students

• The football team

You survey your 22 classmates on their favorite color. Six choose green as their favorite color. There are 396 students at your school. Estimate the number of students in your school who would choose green as their favorite color.

• 108

• 126

• 198

• 150

A store manager wants to know if his staff is providing good customer service. Who should he survey?

• The next 3 customers

• 50 random customers

• 50 random people

• His staff

A summer camp surveys 40 campers to see if they would take tennis lessons next week. Twelve campers say they would. There are 250 campers. Estimate the number of campers the counselors should plan on taking tennis lessons next week.

• 60

• 65

• 75

• 80

You want to estimate how many teens in Florida get an allowance. Who should you survey?

• 200 random Florida teens

• Every teen at your school

• Every teen in Florida

• 100 random teens at your school

The art teacher wants to know if her art students would like to work on pottery. Who should she survey?

• 2 random art students

• All of her art class

• The entire school

• 5 random students

Determine whether the sample is biased or unbiased.

You want to estimate the number of students in your school who are on athletic teams outside of school. You survey members of your school’s athletic teams.

• biased

• unbiased

You want to estimate the number of students in your school who think there should be healthier school lunches available. You ask every 5th person waiting in the cafeteria lunch line.

• biased

• unbiased

Determine whether you would survey the population or a sample.

You want to know the average weight of the members of your family.

• population

• sample

Determine whether you would survey the population or a sample.

You want to know the number of grocery stores in Florida that carry your favorite cereal.

• population

• sample