3.2 - 3.3 Practice

Which sampling methods are biased?

Select all that apply.

• Simple random sample (SRS)

• Volunteer response sample

• Cluster random sample

• Systematic random sample

• Convenience sample

Which sampling methods are unbiased?

Select all that apply.

• Simple random sample (SRS)

• Stratified random sample

• Cluster random sample

• Systematic random sample

• Convenience sample

A teacher puts students' names into a har and chooses without looking to get a sample of 10 students

• Simple random sample (SRS)

• Stratified random sample

• Cluster random sample

• Systematic random sample

• Convenience sample

The first 10 students who enter the library are given a survey asking how long they spend doing homework.

• Simple random sample (SRS)

• Stratified random sample

• Cluster random sample

• Volunteer response sample

• Convenience sample

A radio host asks her listeners to visit her website and response to an online poll.

• Simple random sample (SRS)

• Stratified random sample

• Cluster random sample

• Volunteer response sample

• Convenience sample

Every 5th student is chosen from a list of students listed in alphabetical order

• Simple random sample (SRS)

• Stratified random sample

• Cluster random sample

• Systematic random sample

• Convenience sample

The lottery

• Simple random sample (SRS)

• Stratified random sample

• Cluster random sample

• Systematic random sample

• Convenience sample

A parking garage has 6 levels. 2 of the levels are chosen and a survey is placed on each car on those levels.

• Simple random sample (SRS)

• Stratified random sample

• Cluster random sample

• Systematic random sample

• Convenience sample

A farmer divides his cornfield into 14 sections. He selects 5 of them, then samples all the stalks in those sections.

• Simple random sample (SRS)

• Stratified random sample

• Cluster random sample

• Systematic random sample

• Convenience sample

Highway patrol pulls over 1 in every 200 cars passing to check for safety belt violations.

• Simple random sample (SRS)

• Stratified random sample

• Cluster random sample

• Systematic random sample

• Convenience sample