Research Population and Sample

1. A city council member wanted to know how her constituents felt about a planned rezoning, She randomly selected 75 names from the city phone directory and conducted a phone survey.

Identify the population and the sample.

• •A. The population is everyone listed in the city phone directory; the sample is the 75 people selected.

• •B. The population is the residents of the city ; the sample is the registered voters in the city.

• •C. The population is registered voters in the city; the sample is everyone listed in the city phone directory.

2. Administrators at Perez National High School surveyed a random sample of 100 of their seniors to know how seniors at the school felt about the lunch offerings at the school cafeteria.

Identify the population and the sample

• •A. The population is all high school seniors in the Perez, Quezon; the sample is all of the seniors at Perez National High School.

• •B. The population is all students at Perez NHS; the sample is all of the seniors in Perez NHS.

• •C. The population is all seniors at Perez NHS; the sample is the 100 seniors surveyed.

3. The Department of transportation wants to know about provincial vehicles that pas over a toll bridge with several lanes. A camera installed over one lane of the bridge photographs the license plate of every tenth vehicle that passes through that lane.

Identify the population and the sample

• •A. The population is all of the vehicles that pass over the toll bridge; the sample is vehicles from the lane with camera.

• •B. The population is all of the vehicles that pass through the lane with camera; the sample is the group with every tent vehicle that passes through the lane.

• •C. The population is all of the provincial vehicles; the sample is the vehicles that pass over the toll bridge.

4. A market researcher surveys 85 people on their coffee-drinking habits. She wants to know whether people in the local region are willing to switch their regular drink to something new.

What is the sample?

• •A. People in the local region.

• •B. The 85 people.

• •C. Society at large.

• •D. The market researcher

5. Michelle runs a small company with 10 employees. She decided to pick a simple random sample of 3 employees to go on a business trip. She numbers the 0-9 and uses the random digit to select the sample.

Which employees are in the sample?

• •A. 1, 0, 5

• B. 1, 0, 0

• •C. 2, 4,10

6. Each students at a school has a student identification number. Counselors have a computer generate 50 random identification numbers, and the students associated with those numbers are asked to take a survey.

What type of sampling is this?

• A. Simple random sampling

• B. Stratified random sampling

• C. Cluster sampling

• D. Systematic random sampling

• E. None of the above

7. A researcher polls people as they walk by on the street.

What type of sampling is this?

• A. Simple random sampling

• B. Stratified random sampling

• C. Cluster sampling

• D. Systematic random sampling

• E. None of the above

8. A large bakery mass produces cakes on an assembly line. Each shift, a quality control expert randomly selects one of the first ten finished cakes, and every tenth cake thereafter. Employees weigh those cake and give the cakes a detailed visual check.

What type of sampling is this?

• A. Simple random sampling

• B. Stratified random sampling

• C. Cluster sampling

• D. Systematic random sampling

• E. None of the above

9. Inspectors for a hospital chain with multiple locations randomly select some of their locations for a cleanliness check of their operating rooms. The inspectors check every operating room in the hospitals that were chosen.

What type of sampling is this?

• A. Simple random sampling

• B. Stratified random sampling

• C. Cluster sampling

• D. Systematic random sampling

• E. None of the above

10. A school choose 3 randomly selected athletes from each sports teams to participate in a survey about athletics at the school.

What type of sampling is this?

• A. Simple random sampling

• B. Stratified random sampling

• C. Cluster sampling

• D. Systematic random sampling

• E. None of the above