Statistics Pop Quiz

A student wants to know which type of pizza the students at his high school prefer. Which option would give an unbiased, representative sample:

• Asking all the students in the hot lunch line.

• Asking 10 random students from each homeroom.

• Asking every other student who gets off a school bus.

• Asking all the 10th graders.

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

A sample where characteristics accurately reflect those of the larger population from which the sample is being selected.

• Convenience Sample

• Random Sample

• Representative Sample

• Systematic Sample

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

The counselors at a camp are scheduling activities for family visitation day. They decide to conduct a survey to determine which activities campers would most like to share with their families.

Which describes a method for getting a sample that is both representative and random?

• During the dinner hour, announce that any camper interested in doing so can collect and complete a survey.

• During camp free time, ask every fifth camper in the arts and crafts hall to complete a survey.

• During morning roll call, ask every tenth camper to complete a survey.

• During camp free time, ask all campers down at the lake to complete a survey.

Tags

CCSS.HSS.IC.B.3

A musician wanted to see what people who listened to his last album thought about the songs. Which choice is the best sample?

• Every person who listened to the album.

• A selection of people who didn't want to listen to the album

• 250 girls who listened to the album

• A selection of 3,294 people who listened to the album.

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

Maria collects data from a random sample of 7th graders in her school and finds that 16 out of 20 7th graders participate in after-school activities. How many students should Maria expect to participate in after-school activities if 240 total 7th graders attend Maria's school? Write the numerical answer only.

Tags

CCSS.7.RP.A.3

A movie theater randomly samples the types of admission tickets sold on Friday in the afternoon and the evening. If 400 tickets are sold on a Friday afternoon, use your inference and proportional reasoning skills to determine how many of those 400 tickets would be adult tickets. Type your numerical answer only.

A representative sample of 80 customers in a clothing store was surveyed about how they paid for their purchases. The table shows the responses. Based on the results, which of the following are valid inferences. Select all that apply.

• Tomorrow, 8 out of the first 80 customers will for sure pay with a gift card.

• In a group of 40 customers, it is expected that about 10 will pay with cash.

• About 0.3, or 30%, of all the store's customers will pay with a credit card.

• A sample of 100 customers would provide less reliable data.

Tags

CCSS.7.SP.A.2

Mr. Jackson wants to know his advisory's favorite video game. He picks 5 students to ask.

What is the sample?

• All students in 7th grade

• All students in his advisory

• The 5 students he picks

• All students in section 703

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

Mr. Jackson wants to know his advisory's favorite video game. He picks 5 students to ask.

What is the population?

• All students in 7th grade

• All students in his advisory

• The 5 students he picks

• All students in section 703

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

What is the difference between a sample and a population?

• Populations only consider a portion of the sample being studied.

• Samples only consider a portion of the population being studied.

• Populations do not always represent the entire group of people in question.

• Samples are generally much larger than populations.

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1