# Measurement and experiments

> Conversions divided by eligible visits or opportunities under a defined measurement rule.

Course: [Digital marketing foundations](https://studybrix.com/en/courses/digital-marketing/index.md)
Level: university
Prerequisites: Percentages and basic business vocabulary.

## Notes

### Conversion rate

Conversions divided by eligible visits or opportunities under a defined measurement rule.

### Attribution

A model assigning credit for outcomes across interactions or channels.

### A/B test

A randomized comparison of two variants under defined conditions.

### Guardrail metric

A measure monitored to detect harmful side effects while optimizing another outcome.

## Practice questions

### 1. Which term best matches this description: Conversions divided by eligible visits or opportunities under a defined measurement rule.

A. A/B test
B. Attribution
C. Conversion rate
D. Guardrail metric

Answer: Conversion rate

Explanation: Conversion rate is the matching concept in this lesson.

### 2. Which term best matches this description: A model assigning credit for outcomes across interactions or channels.

A. Guardrail metric
B. Conversion rate
C. A/B test
D. Attribution

Answer: Attribution

Explanation: Attribution is the matching concept in this lesson.

### 3. Which concept would you apply first in a situation where a randomized comparison of two variants under defined conditions.

A. A/B test
B. Guardrail metric
C. Attribution
D. Conversion rate

Answer: A/B test

Explanation: The scenario directly calls for A/B test.

### 4. Name the concept described as: A measure monitored to detect harmful side effects while optimizing another outcome.

Answer: Guardrail metric

Explanation: The intended concept is Guardrail metric.

### 5. Which statement about Conversion rate is most accurate?

A. A measure monitored to detect harmful side effects while optimizing another outcome.
B. A randomized comparison of two variants under defined conditions.
C. A model assigning credit for outcomes across interactions or channels.
D. Conversions divided by eligible visits or opportunities under a defined measurement rule.

Answer: Conversions divided by eligible visits or opportunities under a defined measurement rule.

Explanation: The definition in the lesson notes gives the required condition.

### 6. Explain one important difference between Conversion rate and Attribution.

Sample answer / marking guidance: Conversion rate: Conversions divided by eligible visits or opportunities under a defined measurement rule. Attribution: A model assigning credit for outcomes across interactions or channels.

Explanation: Credit a clear distinction using both definitions and an appropriate example if supplied.

### 7. Give a short example showing how A/B test would be used in practice.

Sample answer / marking guidance: A valid example should demonstrate this idea: A randomized comparison of two variants under defined conditions.

Explanation: Credit a relevant scenario that applies the concept rather than merely naming it.

### 8. Summarize why Guardrail metric matters in the lesson “Measurement and experiments”.

Sample answer / marking guidance: Guardrail metric matters because A measure monitored to detect harmful side effects while optimizing another outcome.

Explanation: Credit the core purpose, scope and any important limitation from the notes.

## Further reading

- https://support.google.com/analytics/

Original AI-assisted educational draft; not independently teacher-reviewed. References support further study, not copied exercises, affiliation or curriculum accreditation.