Lesson 4.2 Sampling Methods

Interview the first 30 students who enter the school in the morning.

• 1) simple random

• 2) voluntary response

• 3) convenience

Assign each car in a dealership a number and then use a random-number table to select the cars to be inspected.

• 1) volunteer response

• 2) simple random sample

• 3) convenience

Political webpages often allow readers to rate whether they strongly agree, agree, disagree, or strongly disagree with the President's decision on any given situation. This is a form of:

• 1) Voluntary Response

• 2) Convenience Sampling

• 3) Simple Random Sampling

Marianne wanted to know students' opinion on the new schedule at school. She places students' names in a container and randomly picks out 20 names.

• 1) Convenience Sampling

• 2) Volunteer response

• 3) Simple Random Sampling

Why do we randomly select our samples?

• 1) for control

• 2) reduce bias

• 3) so we don't get the same answers from everyone

• 4) to eliminate confounding results

A teacher wants to know the average time spent doing homework by the students in her class of 20 girls and 5 boys.

She selects the first five who raise their hands.

• 1) Simple Random

• 2) Convenience

• 3) Voluntary Response

A teacher wants to know the average time spent doing homework by the students in her class of 20 girls and 5 boys.

She selects the five closest to her desk.

• simple random

• Voluntary Response

• Convenience

A ___ is a small portion of the population used to gather data from.

• 1) Population

• 2) Sample

A ___ is a large group that includes everything being studied.

• 1) Sample

• 2) Population

Elise, a supermarket employee, approached 50 random customers and asked whether they would be willing to discuss what they like most about the store. She interviewed the 22 who said yes. Is this sample of the supermarket's customers likely to be biased?

• 1) yes

• 2) no