TEKS.MATH.7.12B

A sample chosen at random form a randomly chosen subgroup or subgroups.

• random sample
• systematic sample
• stratified sample

Tags

TEKS.MATH.7.6F

TEKS.MATH.7.12B

Your school is choosing new school colors. Which group should you ask to get a random sample of student opinion?

• ten 7th grade students
• every tenth student that enters the building in the morning
• twenty 1st and 2nd graders
• every other student going into the principal's office

Tags

TEKS.MATH.7.12B

Parents at a middle school were randomly selected to participate in a survey.  Forty-Two out of 60 parents who were surveyed support a proposal to buy new computers.  There are 456 parents with students at the middle school.  Predict how many of these parents are likely to support the proposal. 

• 42 parents
• 70 parents
• 137 parents 
• 319 parents

Tags

TEKS.MATH.7.6F

TEKS.MATH.7.12B

Andre wants to survey a random sample of the student body in his school to find out which day after school would work best for students to do volunteer work for a local charity. Which

sample would best represent the student body?

• asking twenty students waiting in line for lunch

• asking twenty students on their way to the bus after school

• asking one person from the seventh grade daily for twenty days

• asking one person each from twenty different classrooms during the first class period

Tags

TEKS.MATH.7.6F

TEKS.MATH.7.12B

Biased or Random?

You want to survey the students in your school about their exercise habits. At lunchtime you stand by a vending machine. You survey every student who buys something from the vending machine.

• Biased sample

• Random sample

Tags

TEKS.MATH.7.12B

Biased or Random?

Audi wants to find out how students get to school at Churchill so she places the names of all students into a fish bowl and pulls out 50 so she can survey them.

• Biased sample

• Random sample

Tags

TEKS.MATH.7.12B

A bank randomly surveyed 50 of its customers by mail to find out how customers use its mobile banking service. The survey found that only 11 of the 50 customers used the service.

If the branch has 1,700 customers, about _____ customers use the mobile banking service.

*Only type in the numerical answer.

Tags

TEKS.MATH.7.6F

TEKS.MATH.7.12B

_________ is a sample in which each individual or object in the entire population has an equal chance of being selected.

• Sample

• Population

• Random Sample

• Quartile

Tags

TEKS.MATH.7.6F

TEKS.MATH.7.12B

A random sample of shoppers at Food Lion are asked the question, "If there is no difference in cost, would you prefer to buy organic or non-organic produce?" The table shows the results. Which statement is a correct inference from this data?

• There is no difference between growing produce organically or inorganically.

• Shoppers at Food Lion have no preference regarding organic or non-organic produce.

• Organic produce is better for the environment

• In general, shoppers at Food Lion prefer organic produce.

Tags

TEKS.MATH.7.6F

TEKS.MATH.7.12B

Lenny surveys a random sample of shoppers at a grocery store. He conducts his survey on Saturday morning. The survey consists of a single question: "What mode of transportation did you use to travel to the grocery store this morning?" The table shows the results.

• Very few shoppers use a car to travel to the grocery store

• The majority of shoppers walk to the grocery store

• Saturdays are busier at the grocery store than Tuesdays

• More shoppers typically take the bus than ride their bikes.

Tags

TEKS.MATH.7.6F

TEKS.MATH.7.12B