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Grade 9 · unit review

Review: Health evidence and source comparisons

Evaluate evidence strength, denominator scope and privacy in fictional health-information studies.

Download reviews and answer keys

Bring the unit skills together

Use these 4 new cases to check your reasoning. Choices are temporary and are not saved to an account, sent to staff or recorded as school grades. Download your current review choices before leaving or reloading.

Unit review questions
1. Compare evidence with the claim it supports: A sample finding is reported with sample size and the exact navigation task. What fits?
Need a hint?
  • Keep population, task and outcome aligned with the claim.
  • Classroom study cards are not real research or verified LifeStarter outcomes.
2. Calculate a fictional response proportion: Fictional case 5: responses=24, invitations=40. What is the modeled result using the stated method?
Need a hint?
  • A response count is not a proportion until its invitation count is stated.
  • A low response does not diagnose motivation or prove a program’s health effects.
3. Distinguish association from a cause: Attendees had higher baseline skill than nonattendees and later score higher. What fits?
Need a hint?
  • A group difference does not establish cause without design evidence.
  • Knowledge, participation and clinical health are different outcomes.
4. Compare percentage-point differences: Fictional case 5: laterPercent=90, earlierPercent=70. What is the modeled result using the stated method?
Need a hint?
  • Subtract percentages for their point difference.
  • A descriptive difference alone does not establish why it changed.

The download contains your current choices and any checked feedback. Keep the separate transfer-task work in your own document; downloading its instructions does not mark it complete.

Use the skills in a new task

A fictional self-selected workshop reports response 18/30 and knowledge completion 50% then 70%. Explain the two numbers and what they cannot establish.

Work on paper or in your own document. Explain the choices you made.

  • Use the supplied facts without personal disclosures.
  • Apply at least two methods from this unit.
  • Show the sequence, calculation or evidence behind the decision.
  • Include a relevant boundary, help step or accessible alternative.
Compare with a model response

The response proportion is 18/30*100=60%. Completion differs by 70−50=20 percentage points. Self-selection can introduce prior group differences, so these supplied numbers do not prove causation, clinical benefit or real LifeStarter outcomes. Use source and privacy checks for any general-information page.

A different response can also meet the criteria. Compare the evidence and reasoning, rather than copying the wording.