Zembula

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Subject (87)Email A/B Testing Is Statistically Broken. Here’s the ROI Case for Holdout Measurement.
Preheader (149)The sample-size math shows most retail email A/B testing cannot detect the lifts it claims to find. ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏
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Email A/B Testing Is Statistically Broken. Here’s the ROI Case for Holdout Measurement.

The sample-size math shows most retail email A/B testing cannot detect the lifts it claims to find. ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏
Email A/B Testing Is Statistically Broken. Here’s the ROI Case for Holdout Measurement.