Stage 9 - Q1 - 2 marks
Classify the number of days spent reading in the last week at the library.
Hint
Decide whether values are counts, measurements or labels.
Stage 9 - Q2 - 2 marks
Classify the favourite activity of library members.
Hint
Decide whether values are counts, measurements or labels.
Stage 9 - Q3 - 2 marks
For library members at the library, investigate whether number of days spent reading in the last week is linked to mean daily reading time in minutes that week. Name the two variables.
Hint
Both variables must describe the same observational unit.
Stage 9 - Q4 - 2 marks
For mean daily reading time in minutes that week, why specify one unit and start/end rule?
Hint
Imagine two observers using different definitions.
Stage 9 - Q5 - 3 marks
Write a testable prediction linking number of days spent reading in the last week and mean daily reading time in minutes that week.
Hint
A useful prediction can be supported or challenged by collected data.
Stage 9 - Q6 - 3 marks
Design record-sheet headings to investigate number of days spent reading in the last week and mean daily reading time in minutes that week.
Hint
Include a link between the variables, a unit and a time period.
Stage 9 - Q7 - 3 marks
The library trials a questionnaire on five friends. Is the pilot a representative final sample?
Hint
Method testing and population estimation have different purposes.
Stage 9 - Q8 - 3 marks
A study at the library finds an association between number of days spent reading in the last week and mean daily reading time in minutes that week. Does this prove causation?
Hint
An observed link is weaker evidence than a controlled comparison.
Stage 9 - Q9 - 4 marks
Plan a fair comparison of mean daily reading time in minutes that week for library members in Years 8 and 9.
Hint
Separate group selection, measurement consistency and interpretation.
Stage 9 - Q10 - 6 marks
Challenge: Design a complete investigation of whether number of days spent reading in the last week is associated with mean daily reading time in minutes that week at the library. Include a pilot and a cautious conclusion.
Hint
Connect the question, population, paired records, pilot, collection and conclusion.