AP Stats Hypothesis Testing 1 — Questions and Answers
Question 1: What is the purpose of non-destructive testing (NDT)?
- To evaluate material properties and detect defects without damaging the item (Correct answer)
- To test materials until they break
- To reduce inspection costs by skipping some items
- To replace visual inspection entirely
Correct answer: To evaluate material properties and detect defects without damaging the item
NDT methods evaluate materials and components for defects without causing damage, allowing continued use of the item tested.
Question 2: When should inspection be performed during a project?
- At defined quality hold points and milestones throughout the project (Correct answer)
- Only at project completion
- Only when a defect is reported
- Once per calendar year
Correct answer: At defined quality hold points and milestones throughout the project
Inspection at key milestones catches issues early when they are less costly to correct than at project completion.
Question 3: What is the purpose of acceptance criteria in testing?
- To define the conditions that must be met for work to be approved (Correct answer)
- To make testing as difficult as possible
- To justify rejecting all work
- To reduce the number of tests required
Correct answer: To define the conditions that must be met for work to be approved
Acceptance criteria provide clear, objective standards for determining whether work meets quality requirements.
Question 4: What documentation should accompany inspection results?
- Test methods used, findings, acceptance criteria, and inspector credentials (Correct answer)
- Only a pass or fail notation
- Just the date of inspection
- A summary written from memory
Correct answer: Test methods used, findings, acceptance criteria, and inspector credentials
Complete inspection documentation ensures traceability and allows verification of results by qualified reviewers.
Question 5: What is statistical sampling in quality inspection?
- Inspecting a representative portion of items to draw conclusions about the whole batch (Correct answer)
- Inspecting every single item produced
- Randomly skipping inspections to save time
- Only inspecting items that look defective
Correct answer: Inspecting a representative portion of items to draw conclusions about the whole batch
Statistical sampling uses mathematical principles to select a representative sample, making quality assessment efficient and reliable.
Question 6: What should happen when inspection reveals a non-conformance?
- Document it, determine the cause, and implement corrective action (Correct answer)
- Ignore it if it seems minor
- Blame the previous shift
- Rework it without documentation
Correct answer: Document it, determine the cause, and implement corrective action
Non-conformances require documentation, root cause analysis, and corrective action to prevent recurrence.
AP Stats Hypothesis Testing 1
What is the purpose of non-destructive testing (NDT)?