Investigate Retail Revenue Decline and Analyze QR-Code Impact

Q: Investigate Retail Revenue Decline and Analyze QR-Code Impact

This question evaluates a data scientist's skills in estimation, attribution, funnel modeling, conversion reasoning, and cohort-based diagnostic analytics within the Analytics & Experimentation domain.

Q: How do I approach Analytics & Experimentation interview questions?

Analytics & Experimentation questions require understanding of core concepts and practice. PracHub provides solutions with explanations to help you master analytics & experimentation interviews.

Question

Estimation and Diagnostic Analysis Task

Scenario

A national Super Bowl TV spot displays a QR code that offers a $15 coupon for new sign-ups. In the same week, the retail product line experiences a 20% week-over-week revenue decline.

Questions

Estimating QR Ad Impact

How would you estimate the number of sign-ups generated by the Super Bowl QR-code ad?
Walk through a funnel from reach → scans → sign-ups, and justify your CTR/CVR assumptions.
Include how you would validate this estimate with data.

Investigating Revenue Decline

Retail revenue fell 20% week-over-week. How would you investigate the decline and propose next steps?
How would different user cohorts factor into your analysis and recommendations?

Investigate Retail Revenue Decline and Analyze QR-Code Impact

Estimation and Diagnostic Analysis Task

Scenario

Questions

Solution

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