1. What Is the Difference Between a Census and a Sampling?

Name: ______Period: ______

Introductory Statistics – Homework 1.3 B

1. What is the difference between a census and a sampling?

2. What is the difference between “With Replacement” and “Without Replacement?”

Identify the Sampling Technique that is being used for each – Simple Random, Stratified, Cluster, Systematic, or Convenience

3. In a region, 500 rural persons were randomly selected and 500 urban persons were randomly selected to participate in a health study.

4. Using a random digit dialing system, researchers chose 1600 people and asked what obstacles kept them from exercising.

5. Questioning students as they left a university library, 350 were asked about their study habits.

6. After a hurricane, a disaster area is divided into 200 equal grids. Thirty of the grids are selected, and every occupied household in the grid is interviewed to help focus relief efforts on what residents require the most.

7. Chosen at random, 1210 hospital outpatients were contacted and asked their opinion of the care they received. Identify the Sampling Technique that is being used for each – Simple Random, Stratified, Cluster, Systematic, or Convenience

8. For quality assurance, every 20th engine part is selected from an assembly line and tested for durability.

9. Soybeans are planted on a 48-acre field. The field is divided into one-acre subplots. A sample of plants is taken from each subplot to estimate the harvest.

10. The first 10 teachers leaving a faculty lounge were questioned about their teaching styles and grading methods.

11. A list of managers is compiled and ordered. After a starting number is randomly chosen, every 9th name is selected until 1000 managers are selected.

Decide which method of data collection you would use to gather data for each study - Observation, Experiment, Simulation, or Survey

12. A study on the effect of exercise on anxiety

13. A study on the effect of a new brake system for a vehicle.

14. A study on what activities 3rd graders participate in at recess.

15. A study on college students’ opinion on the cafeteria food.