1. Lesson 4.5 – Conducting a Survey to Collect Two-Variable Data

2. Steps: 1.Choose a topic Choose a topic that is related to two- variable data Possible examples?

3. Steps: 1.Choose a topic Choose a topic that is related to two-variable data Possible examples? Write a research question Is there a correlation between _______ and _______? How does this differ from a hypothesis?

4. Steps: 1.Choose a topic Choose a topic that is related to two-variable data Possible examples? Write a research question Is there a correlation between _______ and _______? How does this differ from a hypothesis? 2.Select a sample What is the population? What is the population size?

5. Steps: 2.Select a sample What is the population? What is the population size? What is the size of the sample you should use?

6. Steps: 2.Select a sample What is the population? What is the population size? What is the size of the sample you should use? What is the sampling technique you should use?

7. Steps: 2.Select a sample What is the population? What is the population size? What is the size of the sample you should use? What is the sampling technique you should use? How can you ensure that it is a representative sample?

8. Steps: 2.Select a sample What is the population? What is the population size? What is the size of the sample you should use? What is the sampling technique you should use? How can you ensure that it is a representative sample? 3.Design your questionnaire Write your survey questions ensuring that they are unbiased.

9. Steps: 3.Design your questionnaire Write your survey questions ensuring that they are unbiased. Will you conduct your survey by interviewing or by having the individuals complete a survey? Which is best to ensure valid answers? Do you want to include questions related to background information such as age, gender, or grade?

10. Steps: 3.Design your questionnaire Write your survey questions ensuring that they are unbiased. Will you conduct your survey by interviewing or by having the individuals complete a survey? Which is best to ensure valid answers? Do you want to include questions related to background information such as age, gender, or grade? 4.Collect your data Collect responses using the sampling techniques you outlined.

11. Steps: 4.Collect your data Collect responses using the sampling techniques you outlined. 5.Organize the Data Organize the data using a table This can be easily done with computer spreadsheet software

12. Steps: 5. Organize the Data Organize the data using a table This can be easily done with computer spreadsheet software 6. Drawing the Line of Best Fit Create a scatter plot Draw the line of best fit Is there a correlation?

13. Steps: 7.Analyse the scatter plot and draw conclusions Write a conclusion that summarizes your results and answers your research question. 8.Extending the investigation If you collected extra data, you can extend your investigation. Cause-and-effect relationship? You may wish to explore further research.