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Education Services home page > CensusAtSchool home page > Year 7 Resources

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Back to CensusAtSchool home page CaSQ 17A - Scatter plots. Year level vs. Concentration Time

You can download this activity as a rich text file (RTF) using the link at the bottom of the page.

How to: Get a Random Sample from CensusAtSchool

Go to the CensusAtSchool Random Sampler to download a sample.

Reference year: (select year) Sample size: At least 30 students

Select questions: Year level, Concentration Game

Location:
Select Location Year level: All

To project privacy there is a rule built into the sampler that the requested sample size cannot exceed 10% of the respondents for the parameters entered.


This task is designed to be completed by hand drawing a scatterplot. It can also be completed using Excel or CAS calculator.

Task:

1. Using your CensusAtSchool random sample, enter both sets of thirty numbers as:

      • a table in your workbook, or
      • two columns in Excel, or
      • two separate lists in your CAS calculator.

2. Create a scatter plot with your data.
      • Think about which set of data is the independent and dependent variable,
      • Plan your axes to include the highest and lowest values in the data and
      • Include a title that includes the variable names.

3. Look at your graph. Can you see any trend or pattern to the data? Complete this sentence:

As school year level __________________, concentration time __________________.


Extension:

4. On your scatterplot draw a line of best fit by eye. Remember to consider the slope and the position of this line.


5. Use the line to complete the following sentence: Each time the school year level increases by 1 year, concentration time___________________ by _______ seconds.

6. Explain what this means in a sentence using your own words



Download the full activity:


Commonwealth of Australia 2008

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