Question/problem, investigation method, data collection, analysis, interpretation and assumptions; Critiquing statistical claims and evidence
Example 1
Which is a statistical question suitable for an investigation?
Show worked answer
Answer: How do travel times vary among students?
- A statistical question anticipates variability and requires data from a group.
Example 2
Which is the correct investigation sequence?
Show worked answer
Answer: Question → collect → display/analyse → conclude
- Plan the question and collection before analysing, then draw a conclusion supported by the data.
Example 3
A survey of 11 classmates makes a claim about all 9000 adults in a town. What is the main limitation?
Show worked answer
Answer: The sample does not represent the target population
- The sampled group differs systematically from the population in the claim.