This question evaluates forecasting and attribution skills within a digital acquisition funnel, including estimating event rates (QR scans), integrating TV delivery and first-party analytics, and modeling conversion from scan to account sign-up.

You are advising a brand running a QR-code Super Bowl TV spot. The goal is to forecast and then measure the acquisition funnel from TV viewership to QR scans and ultimately to new account sign-ups. Assume you can access first-party web/app analytics and standard TV delivery data; ad-partner conversion data may be limited.
(a) How would you estimate the percentage of viewers who will scan the QR code?
(b) What data sources would you use?
(c) If only prior TV campaign data is available (no ad-partner conversion data), how would you approximate the scan rate?
(d) How would you estimate the conversion rate from scan to account sign-up?
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